|  | from urllib3 import PoolManager
orig_pool_init = PoolManager.__init__
def pool_init(self, *args, **kwargs):
    orig_pool_init(self, *args, **kwargs)
    self.pool_classes_by_scheme = {**self.pool_classes_by_scheme}
def patch_urllib3():
    PoolManager.__init__ = pool_init
 |