Baoding-FenShuaJiang
/
Green_GoodERP18_FSJ_Standard


			
							<!DOCTYPE html>

<html lang="en" data-content_root="./">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="viewport" content="width=device-width, initial-scale=1" />
<meta property="og:title" content="History and License" />
<meta property="og:type" content="website" />
<meta property="og:url" content="https://docs.python.org/3/license.html" />
<meta property="og:site_name" content="Python documentation" />
<meta property="og:description" content="History of the software: Python was created in the early 1990s by Guido van Rossum at Stichting Mathematisch Centrum (CWI, see https://www.cwi.nl/) in the Netherlands as a successor of a language c..." />
<meta property="og:image" content="https://docs.python.org/3/_static/og-image.png" />
<meta property="og:image:alt" content="Python documentation" />
<meta name="description" content="History of the software: Python was created in the early 1990s by Guido van Rossum at Stichting Mathematisch Centrum (CWI, see https://www.cwi.nl/) in the Netherlands as a successor of a language c..." />
<meta property="og:image:width" content="200" />
<meta property="og:image:height" content="200" />
<meta name="theme-color" content="#3776ab" />

    <title>History and License &#8212; Python 3.12.3 documentation</title><meta name="viewport" content="width=device-width, initial-scale=1.0">
    
    <link rel="stylesheet" type="text/css" href="_static/pygments.css?v=80d5e7a1" />
    <link rel="stylesheet" type="text/css" href="_static/pydoctheme.css?v=bb723527" />
    <link id="pygments_dark_css" media="(prefers-color-scheme: dark)" rel="stylesheet" type="text/css" href="_static/pygments_dark.css?v=b20cc3f5" />
    
    <script src="_static/documentation_options.js?v=2c828074"></script>
    <script src="_static/doctools.js?v=888ff710"></script>
    <script src="_static/sphinx_highlight.js?v=dc90522c"></script>
    
    <script src="_static/sidebar.js"></script>
    
    <link rel="search" type="application/opensearchdescription+xml"
          title="Search within Python 3.12.3 documentation"
          href="_static/opensearch.xml"/>
    <link rel="author" title="About these documents" href="about.html" />
    <link rel="index" title="Index" href="genindex.html" />
    <link rel="search" title="Search" href="search.html" />
    <link rel="copyright" title="Copyright" href="copyright.html" />
    <link rel="prev" title="Copyright" href="copyright.html" />
    <link rel="canonical" href="https://docs.python.org/3/license.html" />
    
      
    <style>
      @media only screen {
        table.full-width-table {
            width: 100%;
        }
      }
    </style>
<link rel="stylesheet" href="_static/pydoctheme_dark.css" media="(prefers-color-scheme: dark)" id="pydoctheme_dark_css">
    <link rel="shortcut icon" type="image/png" href="_static/py.svg" />
            <script type="text/javascript" src="_static/copybutton.js"></script>
            <script type="text/javascript" src="_static/menu.js"></script>
            <script type="text/javascript" src="_static/search-focus.js"></script>
            <script type="text/javascript" src="_static/themetoggle.js"></script> 

  </head>
<body>
<div class="mobile-nav">
    <input type="checkbox" id="menuToggler" class="toggler__input" aria-controls="navigation"
           aria-pressed="false" aria-expanded="false" role="button" aria-label="Menu" />
    <nav class="nav-content" role="navigation">
        <label for="menuToggler" class="toggler__label">
            <span></span>
        </label>
        <span class="nav-items-wrapper">
            <a href="https://www.python.org/" class="nav-logo">
                <img src="_static/py.svg" alt="Python logo"/>
            </a>
            <span class="version_switcher_placeholder"></span>
            <form role="search" class="search" action="search.html" method="get">
                <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" class="search-icon">
                    <path fill-rule="nonzero" fill="currentColor" d="M15.5 14h-.79l-.28-.27a6.5 6.5 0 001.48-5.34c-.47-2.78-2.79-5-5.59-5.34a6.505 6.505 0 00-7.27 7.27c.34 2.8 2.56 5.12 5.34 5.59a6.5 6.5 0 005.34-1.48l.27.28v.79l4.25 4.25c.41.41 1.08.41 1.49 0 .41-.41.41-1.08 0-1.49L15.5 14zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"></path>
                </svg>
                <input placeholder="Quick search" aria-label="Quick search" type="search" name="q" />
                <input type="submit" value="Go"/>
            </form>
        </span>
    </nav>
    <div class="menu-wrapper">
        <nav class="menu" role="navigation" aria-label="main navigation">
            <div class="language_switcher_placeholder"></div>
            
<label class="theme-selector-label">
    Theme
    <select class="theme-selector" oninput="activateTheme(this.value)">
        <option value="auto" selected>Auto</option>
        <option value="light">Light</option>
        <option value="dark">Dark</option>
    </select>
</label>
  <div>
    <h3><a href="contents.html">Table of Contents</a></h3>
    <ul>
<li><a class="reference internal" href="#">History and License</a><ul>
<li><a class="reference internal" href="#history-of-the-software">History of the software</a></li>
<li><a class="reference internal" href="#terms-and-conditions-for-accessing-or-otherwise-using-python">Terms and conditions for accessing or otherwise using Python</a><ul>
<li><a class="reference internal" href="#psf-license-agreement-for-python-release">PSF LICENSE AGREEMENT FOR PYTHON 3.12.3</a></li>
<li><a class="reference internal" href="#beopen-com-license-agreement-for-python-2-0">BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0</a></li>
<li><a class="reference internal" href="#cnri-license-agreement-for-python-1-6-1">CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1</a></li>
<li><a class="reference internal" href="#cwi-license-agreement-for-python-0-9-0-through-1-2">CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2</a></li>
<li><a class="reference internal" href="#zero-clause-bsd-license-for-code-in-the-python-release-documentation">ZERO-CLAUSE BSD LICENSE FOR CODE IN THE PYTHON 3.12.3 DOCUMENTATION</a></li>
</ul>
</li>
<li><a class="reference internal" href="#licenses-and-acknowledgements-for-incorporated-software">Licenses and Acknowledgements for Incorporated Software</a><ul>
<li><a class="reference internal" href="#mersenne-twister">Mersenne Twister</a></li>
<li><a class="reference internal" href="#sockets">Sockets</a></li>
<li><a class="reference internal" href="#asynchronous-socket-services">Asynchronous socket services</a></li>
<li><a class="reference internal" href="#cookie-management">Cookie management</a></li>
<li><a class="reference internal" href="#execution-tracing">Execution tracing</a></li>
<li><a class="reference internal" href="#uuencode-and-uudecode-functions">UUencode and UUdecode functions</a></li>
<li><a class="reference internal" href="#xml-remote-procedure-calls">XML Remote Procedure Calls</a></li>
<li><a class="reference internal" href="#test-epoll">test_epoll</a></li>
<li><a class="reference internal" href="#select-kqueue">Select kqueue</a></li>
<li><a class="reference internal" href="#siphash24">SipHash24</a></li>
<li><a class="reference internal" href="#strtod-and-dtoa">strtod and dtoa</a></li>
<li><a class="reference internal" href="#openssl">OpenSSL</a></li>
<li><a class="reference internal" href="#expat">expat</a></li>
<li><a class="reference internal" href="#libffi">libffi</a></li>
<li><a class="reference internal" href="#zlib">zlib</a></li>
<li><a class="reference internal" href="#cfuhash">cfuhash</a></li>
<li><a class="reference internal" href="#libmpdec">libmpdec</a></li>
<li><a class="reference internal" href="#w3c-c14n-test-suite">W3C C14N test suite</a></li>
<li><a class="reference internal" href="#audioop">Audioop</a></li>
<li><a class="reference internal" href="#asyncio">asyncio</a></li>
</ul>
</li>
</ul>
</li>
</ul>

  </div>
  <div>
    <h4>Previous topic</h4>
    <p class="topless"><a href="copyright.html"
                          title="previous chapter">Copyright</a></p>
  </div>
  <div role="note" aria-label="source link">
    <h3>This Page</h3>
    <ul class="this-page-menu">
      <li><a href="bugs.html">Report a Bug</a></li>
      <li>
        <a href="https://github.com/python/cpython/blob/main/Doc/license.rst"
            rel="nofollow">Show Source
        </a>
      </li>
    </ul>
  </div>
        </nav>
    </div>
</div>

  
    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="genindex.html" title="General Index"
             accesskey="I">index</a></li>
        <li class="right" >
          <a href="py-modindex.html" title="Python Module Index"
             >modules</a> |</li>
        <li class="right" >
          <a href="copyright.html" title="Copyright"
             accesskey="P">previous</a> |</li>

          <li><img src="_static/py.svg" alt="Python logo" style="vertical-align: middle; margin-top: -1px"/></li>
          <li><a href="https://www.python.org/">Python</a> &#187;</li>
          <li class="switchers">
            <div class="language_switcher_placeholder"></div>
            <div class="version_switcher_placeholder"></div>
          </li>
          <li>
              
          </li>
    <li id="cpython-language-and-version">
      <a href="index.html">3.12.3 Documentation</a> &#187;
    </li>

        <li class="nav-item nav-item-this"><a href="">History and License</a></li>
                <li class="right">
                    

    <div class="inline-search" role="search">
        <form class="inline-search" action="search.html" method="get">
          <input placeholder="Quick search" aria-label="Quick search" type="search" name="q" id="search-box" />
          <input type="submit" value="Go" />
        </form>
    </div>
                     |
                </li>
            <li class="right">
<label class="theme-selector-label">
    Theme
    <select class="theme-selector" oninput="activateTheme(this.value)">
        <option value="auto" selected>Auto</option>
        <option value="light">Light</option>
        <option value="dark">Dark</option>
    </select>
</label> |</li>
            
      </ul>
    </div>    

    <div class="document">
      <div class="documentwrapper">
        <div class="bodywrapper">
          <div class="body" role="main">
            
  <section id="history-and-license">
<span id="id1"></span><h1>History and License<a class="headerlink" href="#history-and-license" title="Link to this heading">¶</a></h1>
<section id="history-of-the-software">
<h2>History of the software<a class="headerlink" href="#history-of-the-software" title="Link to this heading">¶</a></h2>
<p>Python was created in the early 1990s by Guido van Rossum at Stichting
Mathematisch Centrum (CWI, see <a class="reference external" href="https://www.cwi.nl/">https://www.cwi.nl/</a>) in the Netherlands as a
successor of a language called ABC.  Guido remains Python’s principal author,
although it includes many contributions from others.</p>
<p>In 1995, Guido continued his work on Python at the Corporation for National
Research Initiatives (CNRI, see <a class="reference external" href="https://www.cnri.reston.va.us/">https://www.cnri.reston.va.us/</a>) in Reston,
Virginia where he released several versions of the software.</p>
<p>In May 2000, Guido and the Python core development team moved to BeOpen.com to
form the BeOpen PythonLabs team.  In October of the same year, the PythonLabs
team moved to Digital Creations (now Zope Corporation; see
<a class="reference external" href="https://www.zope.org/">https://www.zope.org/</a>).  In 2001, the Python Software Foundation (PSF, see
<a class="reference external" href="https://www.python.org/psf/">https://www.python.org/psf/</a>) was formed, a non-profit organization created
specifically to own Python-related Intellectual Property.  Zope Corporation is a
sponsoring member of the PSF.</p>
<p>All Python releases are Open Source (see <a class="reference external" href="https://opensource.org/">https://opensource.org/</a> for the Open
Source Definition). Historically, most, but not all, Python releases have also
been GPL-compatible; the table below summarizes the various releases.</p>
<table class="docutils align-default">
<thead>
<tr class="row-odd"><th class="head"><p>Release</p></th>
<th class="head"><p>Derived from</p></th>
<th class="head"><p>Year</p></th>
<th class="head"><p>Owner</p></th>
<th class="head"><p>GPL compatible?</p></th>
</tr>
</thead>
<tbody>
<tr class="row-even"><td><p>0.9.0 thru 1.2</p></td>
<td><p>n/a</p></td>
<td><p>1991-1995</p></td>
<td><p>CWI</p></td>
<td><p>yes</p></td>
</tr>
<tr class="row-odd"><td><p>1.3 thru 1.5.2</p></td>
<td><p>1.2</p></td>
<td><p>1995-1999</p></td>
<td><p>CNRI</p></td>
<td><p>yes</p></td>
</tr>
<tr class="row-even"><td><p>1.6</p></td>
<td><p>1.5.2</p></td>
<td><p>2000</p></td>
<td><p>CNRI</p></td>
<td><p>no</p></td>
</tr>
<tr class="row-odd"><td><p>2.0</p></td>
<td><p>1.6</p></td>
<td><p>2000</p></td>
<td><p>BeOpen.com</p></td>
<td><p>no</p></td>
</tr>
<tr class="row-even"><td><p>1.6.1</p></td>
<td><p>1.6</p></td>
<td><p>2001</p></td>
<td><p>CNRI</p></td>
<td><p>no</p></td>
</tr>
<tr class="row-odd"><td><p>2.1</p></td>
<td><p>2.0+1.6.1</p></td>
<td><p>2001</p></td>
<td><p>PSF</p></td>
<td><p>no</p></td>
</tr>
<tr class="row-even"><td><p>2.0.1</p></td>
<td><p>2.0+1.6.1</p></td>
<td><p>2001</p></td>
<td><p>PSF</p></td>
<td><p>yes</p></td>
</tr>
<tr class="row-odd"><td><p>2.1.1</p></td>
<td><p>2.1+2.0.1</p></td>
<td><p>2001</p></td>
<td><p>PSF</p></td>
<td><p>yes</p></td>
</tr>
<tr class="row-even"><td><p>2.1.2</p></td>
<td><p>2.1.1</p></td>
<td><p>2002</p></td>
<td><p>PSF</p></td>
<td><p>yes</p></td>
</tr>
<tr class="row-odd"><td><p>2.1.3</p></td>
<td><p>2.1.2</p></td>
<td><p>2002</p></td>
<td><p>PSF</p></td>
<td><p>yes</p></td>
</tr>
<tr class="row-even"><td><p>2.2 and above</p></td>
<td><p>2.1.1</p></td>
<td><p>2001-now</p></td>
<td><p>PSF</p></td>
<td><p>yes</p></td>
</tr>
</tbody>
</table>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>GPL-compatible doesn’t mean that we’re distributing Python under the GPL.  All
Python licenses, unlike the GPL, let you distribute a modified version without
making your changes open source. The GPL-compatible licenses make it possible to
combine Python with other software that is released under the GPL; the others
don’t.</p>
</div>
<p>Thanks to the many outside volunteers who have worked under Guido’s direction to
make these releases possible.</p>
</section>
<section id="terms-and-conditions-for-accessing-or-otherwise-using-python">
<h2>Terms and conditions for accessing or otherwise using Python<a class="headerlink" href="#terms-and-conditions-for-accessing-or-otherwise-using-python" title="Link to this heading">¶</a></h2>
<p>Python software and documentation are licensed under the
<a class="reference internal" href="#psf-license"><span class="std std-ref">PSF License Agreement</span></a>.</p>
<p>Starting with Python 3.8.6, examples, recipes, and other code in
the documentation are dual licensed under the PSF License Agreement
and the <a class="reference internal" href="#bsd0"><span class="std std-ref">Zero-Clause BSD license</span></a>.</p>
<p>Some software incorporated into Python is under different licenses.
The licenses are listed with code falling under that license.
See <a class="reference internal" href="#otherlicenses"><span class="std std-ref">Licenses and Acknowledgements for Incorporated Software</span></a> for an incomplete list of these licenses.</p>
<section id="psf-license-agreement-for-python-release">
<span id="psf-license"></span><h3>PSF LICENSE AGREEMENT FOR PYTHON 3.12.3<a class="headerlink" href="#psf-license-agreement-for-python-release" title="Link to this heading">¶</a></h3>
<pre class="literal-block">1. This LICENSE AGREEMENT is between the Python Software Foundation (&quot;PSF&quot;), and
   the Individual or Organization (&quot;Licensee&quot;) accessing and otherwise using Python
   3.12.3 software in source or binary form and its associated documentation.

2. Subject to the terms and conditions of this License Agreement, PSF hereby
   grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
   analyze, test, perform and/or display publicly, prepare derivative works,
   distribute, and otherwise use Python 3.12.3 alone or in any derivative
   version, provided, however, that PSF's License Agreement and PSF's notice of
   copyright, i.e., &quot;Copyright © 2001-2023 Python Software Foundation; All Rights
   Reserved&quot; are retained in Python 3.12.3 alone or in any derivative version
   prepared by Licensee.

3. In the event Licensee prepares a derivative work that is based on or
   incorporates Python 3.12.3 or any part thereof, and wants to make the
   derivative work available to others as provided herein, then Licensee hereby
   agrees to include in any such work a brief summary of the changes made to Python
   3.12.3.

4. PSF is making Python 3.12.3 available to Licensee on an &quot;AS IS&quot; basis.
   PSF MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.  BY WAY OF
   EXAMPLE, BUT NOT LIMITATION, PSF MAKES NO AND DISCLAIMS ANY REPRESENTATION OR
   WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE
   USE OF PYTHON 3.12.3 WILL NOT INFRINGE ANY THIRD PARTY RIGHTS.

5. PSF SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON 3.12.3
   FOR ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF
   MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 3.12.3, OR ANY DERIVATIVE
   THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

6. This License Agreement will automatically terminate upon a material breach of
   its terms and conditions.

7. Nothing in this License Agreement shall be deemed to create any relationship
   of agency, partnership, or joint venture between PSF and Licensee.  This License
   Agreement does not grant permission to use PSF trademarks or trade name in a
   trademark sense to endorse or promote products or services of Licensee, or any
   third party.

8. By copying, installing or otherwise using Python 3.12.3, Licensee agrees
   to be bound by the terms and conditions of this License Agreement.</pre>
</section>
<section id="beopen-com-license-agreement-for-python-2-0">
<h3>BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0<a class="headerlink" href="#beopen-com-license-agreement-for-python-2-0" title="Link to this heading">¶</a></h3>
<p>BEOPEN PYTHON OPEN SOURCE LICENSE AGREEMENT VERSION 1</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>1. This LICENSE AGREEMENT is between BeOpen.com (&quot;BeOpen&quot;), having an office at
   160 Saratoga Avenue, Santa Clara, CA 95051, and the Individual or Organization
   (&quot;Licensee&quot;) accessing and otherwise using this software in source or binary
   form and its associated documentation (&quot;the Software&quot;).

2. Subject to the terms and conditions of this BeOpen Python License Agreement,
   BeOpen hereby grants Licensee a non-exclusive, royalty-free, world-wide license
   to reproduce, analyze, test, perform and/or display publicly, prepare derivative
   works, distribute, and otherwise use the Software alone or in any derivative
   version, provided, however, that the BeOpen Python License is retained in the
   Software, alone or in any derivative version prepared by Licensee.

3. BeOpen is making the Software available to Licensee on an &quot;AS IS&quot; basis.
   BEOPEN MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.  BY WAY OF
   EXAMPLE, BUT NOT LIMITATION, BEOPEN MAKES NO AND DISCLAIMS ANY REPRESENTATION OR
   WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE
   USE OF THE SOFTWARE WILL NOT INFRINGE ANY THIRD PARTY RIGHTS.

4. BEOPEN SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF THE SOFTWARE FOR
   ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF USING,
   MODIFYING OR DISTRIBUTING THE SOFTWARE, OR ANY DERIVATIVE THEREOF, EVEN IF
   ADVISED OF THE POSSIBILITY THEREOF.

5. This License Agreement will automatically terminate upon a material breach of
   its terms and conditions.

6. This License Agreement shall be governed by and interpreted in all respects
   by the law of the State of California, excluding conflict of law provisions.
   Nothing in this License Agreement shall be deemed to create any relationship of
   agency, partnership, or joint venture between BeOpen and Licensee.  This License
   Agreement does not grant permission to use BeOpen trademarks or trade names in a
   trademark sense to endorse or promote products or services of Licensee, or any
   third party.  As an exception, the &quot;BeOpen Python&quot; logos available at
   http://www.pythonlabs.com/logos.html may be used according to the permissions
   granted on that web page.

7. By copying, installing or otherwise using the software, Licensee agrees to be
   bound by the terms and conditions of this License Agreement.
</pre></div>
</div>
</section>
<section id="cnri-license-agreement-for-python-1-6-1">
<h3>CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1<a class="headerlink" href="#cnri-license-agreement-for-python-1-6-1" title="Link to this heading">¶</a></h3>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>1. This LICENSE AGREEMENT is between the Corporation for National Research
   Initiatives, having an office at 1895 Preston White Drive, Reston, VA 20191
   (&quot;CNRI&quot;), and the Individual or Organization (&quot;Licensee&quot;) accessing and
   otherwise using Python 1.6.1 software in source or binary form and its
   associated documentation.

2. Subject to the terms and conditions of this License Agreement, CNRI hereby
   grants Licensee a nonexclusive, royalty-free, world-wide license to reproduce,
   analyze, test, perform and/or display publicly, prepare derivative works,
   distribute, and otherwise use Python 1.6.1 alone or in any derivative version,
   provided, however, that CNRI&#39;s License Agreement and CNRI&#39;s notice of copyright,
   i.e., &quot;Copyright © 1995-2001 Corporation for National Research Initiatives; All
   Rights Reserved&quot; are retained in Python 1.6.1 alone or in any derivative version
   prepared by Licensee.  Alternately, in lieu of CNRI&#39;s License Agreement,
   Licensee may substitute the following text (omitting the quotes): &quot;Python 1.6.1
   is made available subject to the terms and conditions in CNRI&#39;s License
   Agreement.  This Agreement together with Python 1.6.1 may be located on the
   internet using the following unique, persistent identifier (known as a handle):
   1895.22/1013.  This Agreement may also be obtained from a proxy server on the
   internet using the following URL: http://hdl.handle.net/1895.22/1013.&quot;

3. In the event Licensee prepares a derivative work that is based on or
   incorporates Python 1.6.1 or any part thereof, and wants to make the derivative
   work available to others as provided herein, then Licensee hereby agrees to
   include in any such work a brief summary of the changes made to Python 1.6.1.

4. CNRI is making Python 1.6.1 available to Licensee on an &quot;AS IS&quot; basis.  CNRI
   MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.  BY WAY OF EXAMPLE,
   BUT NOT LIMITATION, CNRI MAKES NO AND DISCLAIMS ANY REPRESENTATION OR WARRANTY
   OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF
   PYTHON 1.6.1 WILL NOT INFRINGE ANY THIRD PARTY RIGHTS.

5. CNRI SHALL NOT BE LIABLE TO LICENSEE OR ANY OTHER USERS OF PYTHON 1.6.1 FOR
   ANY INCIDENTAL, SPECIAL, OR CONSEQUENTIAL DAMAGES OR LOSS AS A RESULT OF
   MODIFYING, DISTRIBUTING, OR OTHERWISE USING PYTHON 1.6.1, OR ANY DERIVATIVE
   THEREOF, EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

6. This License Agreement will automatically terminate upon a material breach of
   its terms and conditions.

7. This License Agreement shall be governed by the federal intellectual property
   law of the United States, including without limitation the federal copyright
   law, and, to the extent such U.S. federal law does not apply, by the law of the
   Commonwealth of Virginia, excluding Virginia&#39;s conflict of law provisions.
   Notwithstanding the foregoing, with regard to derivative works based on Python
   1.6.1 that incorporate non-separable material that was previously distributed
   under the GNU General Public License (GPL), the law of the Commonwealth of
   Virginia shall govern this License Agreement only as to issues arising under or
   with respect to Paragraphs 4, 5, and 7 of this License Agreement.  Nothing in
   this License Agreement shall be deemed to create any relationship of agency,
   partnership, or joint venture between CNRI and Licensee.  This License Agreement
   does not grant permission to use CNRI trademarks or trade name in a trademark
   sense to endorse or promote products or services of Licensee, or any third
   party.

8. By clicking on the &quot;ACCEPT&quot; button where indicated, or by copying, installing
   or otherwise using Python 1.6.1, Licensee agrees to be bound by the terms and
   conditions of this License Agreement.
</pre></div>
</div>
</section>
<section id="cwi-license-agreement-for-python-0-9-0-through-1-2">
<h3>CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2<a class="headerlink" href="#cwi-license-agreement-for-python-0-9-0-through-1-2" title="Link to this heading">¶</a></h3>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright © 1991 - 1995, Stichting Mathematisch Centrum Amsterdam, The
Netherlands.  All rights reserved.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, provided that
the above copyright notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting documentation, and that
the name of Stichting Mathematisch Centrum or CWI not be used in advertising or
publicity pertaining to distribution of the software without specific, written
prior permission.

STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE FOR ANY SPECIAL, INDIRECT
OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.
</pre></div>
</div>
</section>
<section id="zero-clause-bsd-license-for-code-in-the-python-release-documentation">
<span id="bsd0"></span><h3>ZERO-CLAUSE BSD LICENSE FOR CODE IN THE PYTHON 3.12.3 DOCUMENTATION<a class="headerlink" href="#zero-clause-bsd-license-for-code-in-the-python-release-documentation" title="Link to this heading">¶</a></h3>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted.

THE SOFTWARE IS PROVIDED &quot;AS IS&quot; AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
</pre></div>
</div>
</section>
</section>
<section id="licenses-and-acknowledgements-for-incorporated-software">
<span id="otherlicenses"></span><h2>Licenses and Acknowledgements for Incorporated Software<a class="headerlink" href="#licenses-and-acknowledgements-for-incorporated-software" title="Link to this heading">¶</a></h2>
<p>This section is an incomplete, but growing list of licenses and acknowledgements
for third-party software incorporated in the Python distribution.</p>
<section id="mersenne-twister">
<h3>Mersenne Twister<a class="headerlink" href="#mersenne-twister" title="Link to this heading">¶</a></h3>
<p>The <code class="xref py py-mod docutils literal notranslate"><span class="pre">_random</span></code> C extension underlying the <a class="reference internal" href="library/random.html#module-random" title="random: Generate pseudo-random numbers with various common distributions."><code class="xref py py-mod docutils literal notranslate"><span class="pre">random</span></code></a> module
includes code based on a download from
<a class="reference external" href="http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html">http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html</a>. The following are
the verbatim comments from the original code:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>A C-program for MT19937, with initialization improved 2002/1/26.
Coded by Takuji Nishimura and Makoto Matsumoto.

Before using, initialize the state by using init_genrand(seed)
or init_by_array(init_key, key_length).

Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

 3. The names of its contributors may not be used to endorse or promote
    products derived from this software without specific prior written
    permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
&quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


Any feedback is very welcome.
http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
</pre></div>
</div>
</section>
<section id="sockets">
<h3>Sockets<a class="headerlink" href="#sockets" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/socket.html#module-socket" title="socket: Low-level networking interface."><code class="xref py py-mod docutils literal notranslate"><span class="pre">socket</span></code></a> module uses the functions, <code class="xref c c-func docutils literal notranslate"><span class="pre">getaddrinfo()</span></code>, and
<code class="xref c c-func docutils literal notranslate"><span class="pre">getnameinfo()</span></code>, which are coded in separate source files from the WIDE
Project, <a class="reference external" href="https://www.wide.ad.jp/">https://www.wide.ad.jp/</a>.</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. Neither the name of the project nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS&#39;&#39; AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
</pre></div>
</div>
</section>
<section id="asynchronous-socket-services">
<h3>Asynchronous socket services<a class="headerlink" href="#asynchronous-socket-services" title="Link to this heading">¶</a></h3>
<p>The <code class="xref py py-mod docutils literal notranslate"><span class="pre">test.support.asynchat</span></code> and <code class="xref py py-mod docutils literal notranslate"><span class="pre">test.support.asyncore</span></code>
modules contain the following notice:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright 1996 by Sam Rushing

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that copyright notice and this permission
notice appear in supporting documentation, and that the name of Sam
Rushing not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

SAM RUSHING DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
NO EVENT SHALL SAM RUSHING BE LIABLE FOR ANY SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
</pre></div>
</div>
</section>
<section id="cookie-management">
<h3>Cookie management<a class="headerlink" href="#cookie-management" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/http.cookies.html#module-http.cookies" title="http.cookies: Support for HTTP state management (cookies)."><code class="xref py py-mod docutils literal notranslate"><span class="pre">http.cookies</span></code></a> module contains the following notice:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright 2000 by Timothy O&#39;Malley &lt;timo@alum.mit.edu&gt;

               All Rights Reserved

Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appear in all
copies and that both that copyright notice and this permission
notice appear in supporting documentation, and that the name of
Timothy O&#39;Malley  not be used in advertising or publicity
pertaining to distribution of the software without specific, written
prior permission.

Timothy O&#39;Malley DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS, IN NO EVENT SHALL Timothy O&#39;Malley BE LIABLE FOR
ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
</pre></div>
</div>
</section>
<section id="execution-tracing">
<h3>Execution tracing<a class="headerlink" href="#execution-tracing" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/trace.html#module-trace" title="trace: Trace or track Python statement execution."><code class="xref py py-mod docutils literal notranslate"><span class="pre">trace</span></code></a> module contains the following notice:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>portions copyright 2001, Autonomous Zones Industries, Inc., all rights...
err...  reserved and offered to the public under the terms of the
Python 2.2 license.
Author: Zooko O&#39;Whielacronx
http://zooko.com/
mailto:zooko@zooko.com

Copyright 2000, Mojam Media, Inc., all rights reserved.
Author: Skip Montanaro

Copyright 1999, Bioreason, Inc., all rights reserved.
Author: Andrew Dalke

Copyright 1995-1997, Automatrix, Inc., all rights reserved.
Author: Skip Montanaro

Copyright 1991-1995, Stichting Mathematisch Centrum, all rights reserved.


Permission to use, copy, modify, and distribute this Python software and
its associated documentation for any purpose without fee is hereby
granted, provided that the above copyright notice appears in all copies,
and that both that copyright notice and this permission notice appear in
supporting documentation, and that the name of neither Automatrix,
Bioreason or Mojam Media be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.
</pre></div>
</div>
</section>
<section id="uuencode-and-uudecode-functions">
<h3>UUencode and UUdecode functions<a class="headerlink" href="#uuencode-and-uudecode-functions" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/uu.html#module-uu" title="uu: Encode and decode files in uuencode format. (deprecated)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">uu</span></code></a> module contains the following notice:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright 1994 by Lance Ellinghouse
Cathedral City, California Republic, United States of America.
                       All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Lance Ellinghouse
not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.
LANCE ELLINGHOUSE DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL LANCE ELLINGHOUSE CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Modified by Jack Jansen, CWI, July 1995:
- Use binascii module to do the actual line-by-line conversion
  between ascii and binary. This results in a 1000-fold speedup. The C
  version is still 5 times faster, though.
- Arguments more compliant with Python standard
</pre></div>
</div>
</section>
<section id="xml-remote-procedure-calls">
<h3>XML Remote Procedure Calls<a class="headerlink" href="#xml-remote-procedure-calls" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/xmlrpc.client.html#module-xmlrpc.client" title="xmlrpc.client: XML-RPC client access."><code class="xref py py-mod docutils literal notranslate"><span class="pre">xmlrpc.client</span></code></a> module contains the following notice:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>    The XML-RPC client interface is

Copyright (c) 1999-2002 by Secret Labs AB
Copyright (c) 1999-2002 by Fredrik Lundh

By obtaining, using, and/or copying this software and/or its
associated documentation, you agree that you have read, understood,
and will comply with the following terms and conditions:

Permission to use, copy, modify, and distribute this software and
its associated documentation for any purpose and without fee is
hereby granted, provided that the above copyright notice appears in
all copies, and that both that copyright notice and this permission
notice appear in supporting documentation, and that the name of
Secret Labs AB or the author not be used in advertising or publicity
pertaining to distribution of the software without specific, written
prior permission.

SECRET LABS AB AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD
TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANT-
ABILITY AND FITNESS.  IN NO EVENT SHALL SECRET LABS AB OR THE AUTHOR
BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
OF THIS SOFTWARE.
</pre></div>
</div>
</section>
<section id="test-epoll">
<h3>test_epoll<a class="headerlink" href="#test-epoll" title="Link to this heading">¶</a></h3>
<p>The <code class="xref py py-mod docutils literal notranslate"><span class="pre">test.test_epoll</span></code> module contains the following notice:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 2001-2006 Twisted Matrix Laboratories.

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
&quot;Software&quot;), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
</pre></div>
</div>
</section>
<section id="select-kqueue">
<h3>Select kqueue<a class="headerlink" href="#select-kqueue" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/select.html#module-select" title="select: Wait for I/O completion on multiple streams."><code class="xref py py-mod docutils literal notranslate"><span class="pre">select</span></code></a> module contains the following notice for the kqueue
interface:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 2000 Doug White, 2006 James Knight, 2007 Christian Heimes
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS&#39;&#39; AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
</pre></div>
</div>
</section>
<section id="siphash24">
<h3>SipHash24<a class="headerlink" href="#siphash24" title="Link to this heading">¶</a></h3>
<p>The file <code class="file docutils literal notranslate"><span class="pre">Python/pyhash.c</span></code> contains Marek Majkowski’ implementation of
Dan Bernstein’s SipHash24 algorithm. It contains the following note:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>&lt;MIT License&gt;
Copyright (c) 2013  Marek Majkowski &lt;marek@popcount.org&gt;

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the &quot;Software&quot;), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
&lt;/MIT License&gt;

Original location:
   https://github.com/majek/csiphash/

Solution inspired by code from:
   Samuel Neves (supercop/crypto_auth/siphash24/little)
   djb (supercop/crypto_auth/siphash24/little2)
   Jean-Philippe Aumasson (https://131002.net/siphash/siphash24.c)
</pre></div>
</div>
</section>
<section id="strtod-and-dtoa">
<h3>strtod and dtoa<a class="headerlink" href="#strtod-and-dtoa" title="Link to this heading">¶</a></h3>
<p>The file <code class="file docutils literal notranslate"><span class="pre">Python/dtoa.c</span></code>, which supplies C functions dtoa and
strtod for conversion of C doubles to and from strings, is derived
from the file of the same name by David M. Gay, currently available
from <a class="reference external" href="https://web.archive.org/web/20220517033456/http://www.netlib.org/fp/dtoa.c">https://web.archive.org/web/20220517033456/http://www.netlib.org/fp/dtoa.c</a>.
The original file, as retrieved on March 16, 2009, contains the following
copyright and licensing notice:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>/****************************************************************
 *
 * The author of this software is David M. Gay.
 *
 * Copyright (c) 1991, 2000, 2001 by Lucent Technologies.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose without fee is hereby granted, provided that this entire notice
 * is included in all copies of any software which is or includes a copy
 * or modification of this software and in all copies of the supporting
 * documentation for such software.
 *
 * THIS SOFTWARE IS BEING PROVIDED &quot;AS IS&quot;, WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHOR NOR LUCENT MAKES ANY
 * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
 * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
 *
 ***************************************************************/
</pre></div>
</div>
</section>
<section id="openssl">
<h3>OpenSSL<a class="headerlink" href="#openssl" title="Link to this heading">¶</a></h3>
<p>The modules <a class="reference internal" href="library/hashlib.html#module-hashlib" title="hashlib: Secure hash and message digest algorithms."><code class="xref py py-mod docutils literal notranslate"><span class="pre">hashlib</span></code></a>, <a class="reference internal" href="library/posix.html#module-posix" title="posix: The most common POSIX system calls (normally used via module os). (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">posix</span></code></a>, <a class="reference internal" href="library/ssl.html#module-ssl" title="ssl: TLS/SSL wrapper for socket objects"><code class="xref py py-mod docutils literal notranslate"><span class="pre">ssl</span></code></a>, <a class="reference internal" href="library/crypt.html#module-crypt" title="crypt: The crypt() function used to check Unix passwords. (deprecated) (Unix)"><code class="xref py py-mod docutils literal notranslate"><span class="pre">crypt</span></code></a> use
the OpenSSL library for added performance if made available by the
operating system. Additionally, the Windows and macOS installers for
Python may include a copy of the OpenSSL libraries, so we include a copy
of the OpenSSL license here. For the OpenSSL 3.0 release,
and later releases derived from that, the Apache License v2 applies:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>                              Apache License
                        Version 2.0, January 2004
                     https://www.apache.org/licenses/

TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

1. Definitions.

   &quot;License&quot; shall mean the terms and conditions for use, reproduction,
   and distribution as defined by Sections 1 through 9 of this document.

   &quot;Licensor&quot; shall mean the copyright owner or entity authorized by
   the copyright owner that is granting the License.

   &quot;Legal Entity&quot; shall mean the union of the acting entity and all
   other entities that control, are controlled by, or are under common
   control with that entity. For the purposes of this definition,
   &quot;control&quot; means (i) the power, direct or indirect, to cause the
   direction or management of such entity, whether by contract or
   otherwise, or (ii) ownership of fifty percent (50%) or more of the
   outstanding shares, or (iii) beneficial ownership of such entity.

   &quot;You&quot; (or &quot;Your&quot;) shall mean an individual or Legal Entity
   exercising permissions granted by this License.

   &quot;Source&quot; form shall mean the preferred form for making modifications,
   including but not limited to software source code, documentation
   source, and configuration files.

   &quot;Object&quot; form shall mean any form resulting from mechanical
   transformation or translation of a Source form, including but
   not limited to compiled object code, generated documentation,
   and conversions to other media types.

   &quot;Work&quot; shall mean the work of authorship, whether in Source or
   Object form, made available under the License, as indicated by a
   copyright notice that is included in or attached to the work
   (an example is provided in the Appendix below).

   &quot;Derivative Works&quot; shall mean any work, whether in Source or Object
   form, that is based on (or derived from) the Work and for which the
   editorial revisions, annotations, elaborations, or other modifications
   represent, as a whole, an original work of authorship. For the purposes
   of this License, Derivative Works shall not include works that remain
   separable from, or merely link (or bind by name) to the interfaces of,
   the Work and Derivative Works thereof.

   &quot;Contribution&quot; shall mean any work of authorship, including
   the original version of the Work and any modifications or additions
   to that Work or Derivative Works thereof, that is intentionally
   submitted to Licensor for inclusion in the Work by the copyright owner
   or by an individual or Legal Entity authorized to submit on behalf of
   the copyright owner. For the purposes of this definition, &quot;submitted&quot;
   means any form of electronic, verbal, or written communication sent
   to the Licensor or its representatives, including but not limited to
   communication on electronic mailing lists, source code control systems,
   and issue tracking systems that are managed by, or on behalf of, the
   Licensor for the purpose of discussing and improving the Work, but
   excluding communication that is conspicuously marked or otherwise
   designated in writing by the copyright owner as &quot;Not a Contribution.&quot;

   &quot;Contributor&quot; shall mean Licensor and any individual or Legal Entity
   on behalf of whom a Contribution has been received by Licensor and
   subsequently incorporated within the Work.

2. Grant of Copyright License. Subject to the terms and conditions of
   this License, each Contributor hereby grants to You a perpetual,
   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
   copyright license to reproduce, prepare Derivative Works of,
   publicly display, publicly perform, sublicense, and distribute the
   Work and such Derivative Works in Source or Object form.

3. Grant of Patent License. Subject to the terms and conditions of
   this License, each Contributor hereby grants to You a perpetual,
   worldwide, non-exclusive, no-charge, royalty-free, irrevocable
   (except as stated in this section) patent license to make, have made,
   use, offer to sell, sell, import, and otherwise transfer the Work,
   where such license applies only to those patent claims licensable
   by such Contributor that are necessarily infringed by their
   Contribution(s) alone or by combination of their Contribution(s)
   with the Work to which such Contribution(s) was submitted. If You
   institute patent litigation against any entity (including a
   cross-claim or counterclaim in a lawsuit) alleging that the Work
   or a Contribution incorporated within the Work constitutes direct
   or contributory patent infringement, then any patent licenses
   granted to You under this License for that Work shall terminate
   as of the date such litigation is filed.

4. Redistribution. You may reproduce and distribute copies of the
   Work or Derivative Works thereof in any medium, with or without
   modifications, and in Source or Object form, provided that You
   meet the following conditions:

   (a) You must give any other recipients of the Work or
       Derivative Works a copy of this License; and

   (b) You must cause any modified files to carry prominent notices
       stating that You changed the files; and

   (c) You must retain, in the Source form of any Derivative Works
       that You distribute, all copyright, patent, trademark, and
       attribution notices from the Source form of the Work,
       excluding those notices that do not pertain to any part of
       the Derivative Works; and

   (d) If the Work includes a &quot;NOTICE&quot; text file as part of its
       distribution, then any Derivative Works that You distribute must
       include a readable copy of the attribution notices contained
       within such NOTICE file, excluding those notices that do not
       pertain to any part of the Derivative Works, in at least one
       of the following places: within a NOTICE text file distributed
       as part of the Derivative Works; within the Source form or
       documentation, if provided along with the Derivative Works; or,
       within a display generated by the Derivative Works, if and
       wherever such third-party notices normally appear. The contents
       of the NOTICE file are for informational purposes only and
       do not modify the License. You may add Your own attribution
       notices within Derivative Works that You distribute, alongside
       or as an addendum to the NOTICE text from the Work, provided
       that such additional attribution notices cannot be construed
       as modifying the License.

   You may add Your own copyright statement to Your modifications and
   may provide additional or different license terms and conditions
   for use, reproduction, or distribution of Your modifications, or
   for any such Derivative Works as a whole, provided Your use,
   reproduction, and distribution of the Work otherwise complies with
   the conditions stated in this License.

5. Submission of Contributions. Unless You explicitly state otherwise,
   any Contribution intentionally submitted for inclusion in the Work
   by You to the Licensor shall be under the terms and conditions of
   this License, without any additional terms or conditions.
   Notwithstanding the above, nothing herein shall supersede or modify
   the terms of any separate license agreement you may have executed
   with Licensor regarding such Contributions.

6. Trademarks. This License does not grant permission to use the trade
   names, trademarks, service marks, or product names of the Licensor,
   except as required for reasonable and customary use in describing the
   origin of the Work and reproducing the content of the NOTICE file.

7. Disclaimer of Warranty. Unless required by applicable law or
   agreed to in writing, Licensor provides the Work (and each
   Contributor provides its Contributions) on an &quot;AS IS&quot; BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
   implied, including, without limitation, any warranties or conditions
   of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
   PARTICULAR PURPOSE. You are solely responsible for determining the
   appropriateness of using or redistributing the Work and assume any
   risks associated with Your exercise of permissions under this License.

8. Limitation of Liability. In no event and under no legal theory,
   whether in tort (including negligence), contract, or otherwise,
   unless required by applicable law (such as deliberate and grossly
   negligent acts) or agreed to in writing, shall any Contributor be
   liable to You for damages, including any direct, indirect, special,
   incidental, or consequential damages of any character arising as a
   result of this License or out of the use or inability to use the
   Work (including but not limited to damages for loss of goodwill,
   work stoppage, computer failure or malfunction, or any and all
   other commercial damages or losses), even if such Contributor
   has been advised of the possibility of such damages.

9. Accepting Warranty or Additional Liability. While redistributing
   the Work or Derivative Works thereof, You may choose to offer,
   and charge a fee for, acceptance of support, warranty, indemnity,
   or other liability obligations and/or rights consistent with this
   License. However, in accepting such obligations, You may act only
   on Your own behalf and on Your sole responsibility, not on behalf
   of any other Contributor, and only if You agree to indemnify,
   defend, and hold each Contributor harmless for any liability
   incurred by, or claims asserted against, such Contributor by reason
   of your accepting any such warranty or additional liability.

END OF TERMS AND CONDITIONS
</pre></div>
</div>
</section>
<section id="expat">
<h3>expat<a class="headerlink" href="#expat" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/pyexpat.html#module-xml.parsers.expat" title="xml.parsers.expat: An interface to the Expat non-validating XML parser."><code class="xref py py-mod docutils literal notranslate"><span class="pre">pyexpat</span></code></a> extension is built using an included copy of the expat
sources unless the build is configured <code class="docutils literal notranslate"><span class="pre">--with-system-expat</span></code>:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 1998, 1999, 2000 Thai Open Source Software Center Ltd
                               and Clark Cooper

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
&quot;Software&quot;), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
</pre></div>
</div>
</section>
<section id="libffi">
<h3>libffi<a class="headerlink" href="#libffi" title="Link to this heading">¶</a></h3>
<p>The <code class="xref py py-mod docutils literal notranslate"><span class="pre">_ctypes</span></code> C extension underlying the <a class="reference internal" href="library/ctypes.html#module-ctypes" title="ctypes: A foreign function library for Python."><code class="xref py py-mod docutils literal notranslate"><span class="pre">ctypes</span></code></a> module
is built using an included copy of the libffi
sources unless the build is configured <code class="docutils literal notranslate"><span class="pre">--with-system-libffi</span></code>:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 1996-2008  Red Hat, Inc and others.

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
``Software&#39;&#39;), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED ``AS IS&#39;&#39;, WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
</pre></div>
</div>
</section>
<section id="zlib">
<h3>zlib<a class="headerlink" href="#zlib" title="Link to this heading">¶</a></h3>
<p>The <a class="reference internal" href="library/zlib.html#module-zlib" title="zlib: Low-level interface to compression and decompression routines compatible with gzip."><code class="xref py py-mod docutils literal notranslate"><span class="pre">zlib</span></code></a> extension is built using an included copy of the zlib
sources if the zlib version found on the system is too old to be
used for the build:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (C) 1995-2011 Jean-loup Gailly and Mark Adler

This software is provided &#39;as-is&#39;, without any express or implied
warranty.  In no event will the authors be held liable for any damages
arising from the use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software. If you use this software
   in a product, an acknowledgment in the product documentation would be
   appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

Jean-loup Gailly        Mark Adler
jloup@gzip.org          madler@alumni.caltech.edu
</pre></div>
</div>
</section>
<section id="cfuhash">
<h3>cfuhash<a class="headerlink" href="#cfuhash" title="Link to this heading">¶</a></h3>
<p>The implementation of the hash table used by the <a class="reference internal" href="library/tracemalloc.html#module-tracemalloc" title="tracemalloc: Trace memory allocations."><code class="xref py py-mod docutils literal notranslate"><span class="pre">tracemalloc</span></code></a> is based
on the cfuhash project:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 2005 Don Owens
All rights reserved.

This code is released under the BSD license:

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

  * Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

  * Redistributions in binary form must reproduce the above
    copyright notice, this list of conditions and the following
    disclaimer in the documentation and/or other materials provided
    with the distribution.

  * Neither the name of the author nor the names of its
    contributors may be used to endorse or promote products derived
    from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
&quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGE.
</pre></div>
</div>
</section>
<section id="libmpdec">
<h3>libmpdec<a class="headerlink" href="#libmpdec" title="Link to this heading">¶</a></h3>
<p>The <code class="xref py py-mod docutils literal notranslate"><span class="pre">_decimal</span></code> C extension underlying the <a class="reference internal" href="library/decimal.html#module-decimal" title="decimal: Implementation of the General Decimal Arithmetic  Specification."><code class="xref py py-mod docutils literal notranslate"><span class="pre">decimal</span></code></a> module
is built using an included copy of the libmpdec
library unless the build is configured <code class="docutils literal notranslate"><span class="pre">--with-system-libmpdec</span></code>:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 2008-2020 Stefan Krah. All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS &quot;AS IS&quot; AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
</pre></div>
</div>
</section>
<section id="w3c-c14n-test-suite">
<h3>W3C C14N test suite<a class="headerlink" href="#w3c-c14n-test-suite" title="Link to this heading">¶</a></h3>
<p>The C14N 2.0 test suite in the <a class="reference internal" href="library/test.html#module-test" title="test: Regression tests package containing the testing suite for Python."><code class="xref py py-mod docutils literal notranslate"><span class="pre">test</span></code></a> package
(<code class="docutils literal notranslate"><span class="pre">Lib/test/xmltestdata/c14n-20/</span></code>) was retrieved from the W3C website at
<a class="reference external" href="https://www.w3.org/TR/xml-c14n2-testcases/">https://www.w3.org/TR/xml-c14n2-testcases/</a> and is distributed under the
3-clause BSD license:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 2013 W3C(R) (MIT, ERCIM, Keio, Beihang),
All Rights Reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:

* Redistributions of works must retain the original copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the original copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
* Neither the name of the W3C nor the names of its contributors may be
  used to endorse or promote products derived from this work without
  specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
&quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
</pre></div>
</div>
</section>
<section id="audioop">
<h3>Audioop<a class="headerlink" href="#audioop" title="Link to this heading">¶</a></h3>
<p>The audioop module uses the code base in g771.c file of the SoX project.
<a class="reference external" href="https://sourceforge.net/projects/sox/files/sox/12.17.7/sox-12.17.7.tar.gz">https://sourceforge.net/projects/sox/files/sox/12.17.7/sox-12.17.7.tar.gz</a></p>
<blockquote>
<div><p>This source code is a product of Sun Microsystems, Inc. and is provided
for unrestricted use.  Users may copy or modify this source code without
charge.</p>
<p>SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING
THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.</p>
<p>Sun source code is provided with no support and without any obligation on
the part of Sun Microsystems, Inc. to assist in its use, correction,
modification or enhancement.</p>
<p>SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE
OR ANY PART THEREOF.</p>
<p>In no event will Sun Microsystems, Inc. be liable for any lost revenue
or profits or other special, indirect and consequential damages, even if
Sun has been advised of the possibility of such damages.</p>
<p>Sun Microsystems, Inc.
2550 Garcia Avenue
Mountain View, California  94043</p>
</div></blockquote>
</section>
<section id="asyncio">
<h3>asyncio<a class="headerlink" href="#asyncio" title="Link to this heading">¶</a></h3>
<p>Parts of the <a class="reference internal" href="library/asyncio.html#module-asyncio" title="asyncio: Asynchronous I/O."><code class="xref py py-mod docutils literal notranslate"><span class="pre">asyncio</span></code></a> module are incorporated from
<a class="reference external" href="https://github.com/MagicStack/uvloop/tree/v0.16.0">uvloop 0.16</a>,
which is distributed under the MIT license:</p>
<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>Copyright (c) 2015-2021 MagicStack Inc.  http://magic.io

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
&quot;Software&quot;), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
</pre></div>
</div>
</section>
</section>
</section>


            <div class="clearer"></div>
          </div>
        </div>
      </div>
      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
        <div class="sphinxsidebarwrapper">
  <div>
    <h3><a href="contents.html">Table of Contents</a></h3>
    <ul>
<li><a class="reference internal" href="#">History and License</a><ul>
<li><a class="reference internal" href="#history-of-the-software">History of the software</a></li>
<li><a class="reference internal" href="#terms-and-conditions-for-accessing-or-otherwise-using-python">Terms and conditions for accessing or otherwise using Python</a><ul>
<li><a class="reference internal" href="#psf-license-agreement-for-python-release">PSF LICENSE AGREEMENT FOR PYTHON 3.12.3</a></li>
<li><a class="reference internal" href="#beopen-com-license-agreement-for-python-2-0">BEOPEN.COM LICENSE AGREEMENT FOR PYTHON 2.0</a></li>
<li><a class="reference internal" href="#cnri-license-agreement-for-python-1-6-1">CNRI LICENSE AGREEMENT FOR PYTHON 1.6.1</a></li>
<li><a class="reference internal" href="#cwi-license-agreement-for-python-0-9-0-through-1-2">CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2</a></li>
<li><a class="reference internal" href="#zero-clause-bsd-license-for-code-in-the-python-release-documentation">ZERO-CLAUSE BSD LICENSE FOR CODE IN THE PYTHON 3.12.3 DOCUMENTATION</a></li>
</ul>
</li>
<li><a class="reference internal" href="#licenses-and-acknowledgements-for-incorporated-software">Licenses and Acknowledgements for Incorporated Software</a><ul>
<li><a class="reference internal" href="#mersenne-twister">Mersenne Twister</a></li>
<li><a class="reference internal" href="#sockets">Sockets</a></li>
<li><a class="reference internal" href="#asynchronous-socket-services">Asynchronous socket services</a></li>
<li><a class="reference internal" href="#cookie-management">Cookie management</a></li>
<li><a class="reference internal" href="#execution-tracing">Execution tracing</a></li>
<li><a class="reference internal" href="#uuencode-and-uudecode-functions">UUencode and UUdecode functions</a></li>
<li><a class="reference internal" href="#xml-remote-procedure-calls">XML Remote Procedure Calls</a></li>
<li><a class="reference internal" href="#test-epoll">test_epoll</a></li>
<li><a class="reference internal" href="#select-kqueue">Select kqueue</a></li>
<li><a class="reference internal" href="#siphash24">SipHash24</a></li>
<li><a class="reference internal" href="#strtod-and-dtoa">strtod and dtoa</a></li>
<li><a class="reference internal" href="#openssl">OpenSSL</a></li>
<li><a class="reference internal" href="#expat">expat</a></li>
<li><a class="reference internal" href="#libffi">libffi</a></li>
<li><a class="reference internal" href="#zlib">zlib</a></li>
<li><a class="reference internal" href="#cfuhash">cfuhash</a></li>
<li><a class="reference internal" href="#libmpdec">libmpdec</a></li>
<li><a class="reference internal" href="#w3c-c14n-test-suite">W3C C14N test suite</a></li>
<li><a class="reference internal" href="#audioop">Audioop</a></li>
<li><a class="reference internal" href="#asyncio">asyncio</a></li>
</ul>
</li>
</ul>
</li>
</ul>

  </div>
  <div>
    <h4>Previous topic</h4>
    <p class="topless"><a href="copyright.html"
                          title="previous chapter">Copyright</a></p>
  </div>
  <div role="note" aria-label="source link">
    <h3>This Page</h3>
    <ul class="this-page-menu">
      <li><a href="bugs.html">Report a Bug</a></li>
      <li>
        <a href="https://github.com/python/cpython/blob/main/Doc/license.rst"
            rel="nofollow">Show Source
        </a>
      </li>
    </ul>
  </div>
        </div>
<div id="sidebarbutton" title="Collapse sidebar">
<span>«</span>
</div>

      </div>
      <div class="clearer"></div>
    </div>  
    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="genindex.html" title="General Index"
             >index</a></li>
        <li class="right" >
          <a href="py-modindex.html" title="Python Module Index"
             >modules</a> |</li>
        <li class="right" >
          <a href="copyright.html" title="Copyright"
             >previous</a> |</li>

          <li><img src="_static/py.svg" alt="Python logo" style="vertical-align: middle; margin-top: -1px"/></li>
          <li><a href="https://www.python.org/">Python</a> &#187;</li>
          <li class="switchers">
            <div class="language_switcher_placeholder"></div>
            <div class="version_switcher_placeholder"></div>
          </li>
          <li>
              
          </li>
    <li id="cpython-language-and-version">
      <a href="index.html">3.12.3 Documentation</a> &#187;
    </li>

        <li class="nav-item nav-item-this"><a href="">History and License</a></li>
                <li class="right">
                    

    <div class="inline-search" role="search">
        <form class="inline-search" action="search.html" method="get">
          <input placeholder="Quick search" aria-label="Quick search" type="search" name="q" id="search-box" />
          <input type="submit" value="Go" />
        </form>
    </div>
                     |
                </li>
            <li class="right">
<label class="theme-selector-label">
    Theme
    <select class="theme-selector" oninput="activateTheme(this.value)">
        <option value="auto" selected>Auto</option>
        <option value="light">Light</option>
        <option value="dark">Dark</option>
    </select>
</label> |</li>
            
      </ul>
    </div>  
    <div class="footer">
    &copy; 
      <a href="copyright.html">
    
    Copyright
    
      </a>
     2001-2024, Python Software Foundation.
    <br />
    This page is licensed under the Python Software Foundation License Version 2.
    <br />
    Examples, recipes, and other code in the documentation are additionally licensed under the Zero Clause BSD License.
    <br />
    
      See <a href="/license.html">History and License</a> for more information.<br />
    
    
    <br />

    The Python Software Foundation is a non-profit corporation.
<a href="https://www.python.org/psf/donations/">Please donate.</a>
<br />
    <br />
      Last updated on Apr 09, 2024 (13:47 UTC).
    
      <a href="/bugs.html">Found a bug</a>?
    
    <br />

    Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 7.2.6.
    </div>

  </body>
</html>