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  183.   <section id="exceptions">

  184. <span id="asyncio-exceptions"></span><h1>Exceptions<a class="headerlink" href="#exceptions" title="Link to this heading">¶</a></h1>

  185. <p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.12/Lib/asyncio/exceptions.py">Lib/asyncio/exceptions.py</a></p>

  186. <hr class="docutils" />

  187. <dl class="py exception">

  188. <dt class="sig sig-object py" id="asyncio.TimeoutError">

  189. <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">asyncio.</span></span><span class="sig-name descname"><span class="pre">TimeoutError</span></span><a class="headerlink" href="#asyncio.TimeoutError" title="Link to this definition">¶</a></dt>

  190. <dd><p>A deprecated alias of <a class="reference internal" href="exceptions.html#TimeoutError" title="TimeoutError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TimeoutError</span></code></a>,

  191. raised when the operation has exceeded the given deadline.</p>

  192. <div class="versionchanged">

  193. <p><span class="versionmodified changed">Changed in version 3.11: </span>This class was made an alias of <a class="reference internal" href="exceptions.html#TimeoutError" title="TimeoutError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">TimeoutError</span></code></a>.</p>

  194. </div>

  195. </dd></dl>

  196. 

  197. <dl class="py exception">

  198. <dt class="sig sig-object py" id="asyncio.CancelledError">

  199. <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">asyncio.</span></span><span class="sig-name descname"><span class="pre">CancelledError</span></span><a class="headerlink" href="#asyncio.CancelledError" title="Link to this definition">¶</a></dt>

  200. <dd><p>The operation has been cancelled.</p>

  201. <p>This exception can be caught to perform custom operations

  202. when asyncio Tasks are cancelled.  In almost all situations the

  203. exception must be re-raised.</p>

  204. <div class="versionchanged">

  205. <p><span class="versionmodified changed">Changed in version 3.8: </span><a class="reference internal" href="#asyncio.CancelledError" title="asyncio.CancelledError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">CancelledError</span></code></a> is now a subclass of <a class="reference internal" href="exceptions.html#BaseException" title="BaseException"><code class="xref py py-class docutils literal notranslate"><span class="pre">BaseException</span></code></a> rather than <a class="reference internal" href="exceptions.html#Exception" title="Exception"><code class="xref py py-class docutils literal notranslate"><span class="pre">Exception</span></code></a>.</p>

  206. </div>

  207. </dd></dl>

  208. 

  209. <dl class="py exception">

  210. <dt class="sig sig-object py" id="asyncio.InvalidStateError">

  211. <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">asyncio.</span></span><span class="sig-name descname"><span class="pre">InvalidStateError</span></span><a class="headerlink" href="#asyncio.InvalidStateError" title="Link to this definition">¶</a></dt>

  212. <dd><p>Invalid internal state of <a class="reference internal" href="asyncio-task.html#asyncio.Task" title="asyncio.Task"><code class="xref py py-class docutils literal notranslate"><span class="pre">Task</span></code></a> or <a class="reference internal" href="asyncio-future.html#asyncio.Future" title="asyncio.Future"><code class="xref py py-class docutils literal notranslate"><span class="pre">Future</span></code></a>.</p>

  213. <p>Can be raised in situations like setting a result value for a

  214. <em>Future</em> object that already has a result value set.</p>

  215. </dd></dl>

  216. 

  217. <dl class="py exception">

  218. <dt class="sig sig-object py" id="asyncio.SendfileNotAvailableError">

  219. <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">asyncio.</span></span><span class="sig-name descname"><span class="pre">SendfileNotAvailableError</span></span><a class="headerlink" href="#asyncio.SendfileNotAvailableError" title="Link to this definition">¶</a></dt>

  220. <dd><p>The “sendfile” syscall is not available for the given

  221. socket or file type.</p>

  222. <p>A subclass of <a class="reference internal" href="exceptions.html#RuntimeError" title="RuntimeError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">RuntimeError</span></code></a>.</p>

  223. </dd></dl>

  224. 

  225. <dl class="py exception">

  226. <dt class="sig sig-object py" id="asyncio.IncompleteReadError">

  227. <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">asyncio.</span></span><span class="sig-name descname"><span class="pre">IncompleteReadError</span></span><a class="headerlink" href="#asyncio.IncompleteReadError" title="Link to this definition">¶</a></dt>

  228. <dd><p>The requested read operation did not complete fully.</p>

  229. <p>Raised by the <a class="reference internal" href="asyncio-stream.html#asyncio-streams"><span class="std std-ref">asyncio stream APIs</span></a>.</p>

  230. <p>This exception is a subclass of <a class="reference internal" href="exceptions.html#EOFError" title="EOFError"><code class="xref py py-exc docutils literal notranslate"><span class="pre">EOFError</span></code></a>.</p>

  231. <dl class="py attribute">

  232. <dt class="sig sig-object py" id="asyncio.IncompleteReadError.expected">

  233. <span class="sig-name descname"><span class="pre">expected</span></span><a class="headerlink" href="#asyncio.IncompleteReadError.expected" title="Link to this definition">¶</a></dt>

  234. <dd><p>The total number (<a class="reference internal" href="functions.html#int" title="int"><code class="xref py py-class docutils literal notranslate"><span class="pre">int</span></code></a>) of expected bytes.</p>

  235. </dd></dl>

  236. 

  237. <dl class="py attribute">

  238. <dt class="sig sig-object py" id="asyncio.IncompleteReadError.partial">

  239. <span class="sig-name descname"><span class="pre">partial</span></span><a class="headerlink" href="#asyncio.IncompleteReadError.partial" title="Link to this definition">¶</a></dt>

  240. <dd><p>A string of <a class="reference internal" href="stdtypes.html#bytes" title="bytes"><code class="xref py py-class docutils literal notranslate"><span class="pre">bytes</span></code></a> read before the end of stream was reached.</p>

  241. </dd></dl>

  242. 

  243. </dd></dl>

  244. 

  245. <dl class="py exception">

  246. <dt class="sig sig-object py" id="asyncio.LimitOverrunError">

  247. <em class="property"><span class="pre">exception</span><span class="w"> </span></em><span class="sig-prename descclassname"><span class="pre">asyncio.</span></span><span class="sig-name descname"><span class="pre">LimitOverrunError</span></span><a class="headerlink" href="#asyncio.LimitOverrunError" title="Link to this definition">¶</a></dt>

  248. <dd><p>Reached the buffer size limit while looking for a separator.</p>

  249. <p>Raised by the <a class="reference internal" href="asyncio-stream.html#asyncio-streams"><span class="std std-ref">asyncio stream APIs</span></a>.</p>

  250. <dl class="py attribute">

  251. <dt class="sig sig-object py" id="asyncio.LimitOverrunError.consumed">

  252. <span class="sig-name descname"><span class="pre">consumed</span></span><a class="headerlink" href="#asyncio.LimitOverrunError.consumed" title="Link to this definition">¶</a></dt>

  253. <dd><p>The total number of to be consumed bytes.</p>

  254. </dd></dl>

  255. 

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