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web/python-docs/_sources/library/asyncio-exceptions.rst.txt

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+.. currentmodule:: asyncio
+
+
+.. _asyncio-exceptions:
+
+==========
+Exceptions
+==========
+
+**Source code:** :source:`Lib/asyncio/exceptions.py`
+
+----------------------------------------------------
+
+.. exception:: TimeoutError
+
+   The operation has exceeded the given deadline.
+
+   .. important::
+      This exception is different from the builtin :exc:`TimeoutError`
+      exception.
+
+
+.. exception:: CancelledError
+
+   The operation has been cancelled.
+
+   This exception can be caught to perform custom operations
+   when asyncio Tasks are cancelled.  In almost all situations the
+   exception must be re-raised.
+
+   .. versionchanged:: 3.8
+
+      :exc:`CancelledError` is now a subclass of :class:`BaseException`.
+
+
+.. exception:: InvalidStateError
+
+   Invalid internal state of :class:`Task` or :class:`Future`.
+
+   Can be raised in situations like setting a result value for a
+   *Future* object that already has a result value set.
+
+
+.. exception:: SendfileNotAvailableError
+
+   The "sendfile" syscall is not available for the given
+   socket or file type.
+
+   A subclass of :exc:`RuntimeError`.
+
+
+.. exception:: IncompleteReadError
+
+   The requested read operation did not complete fully.
+
+   Raised by the :ref:`asyncio stream APIs<asyncio-streams>`.
+
+   This exception is a subclass of :exc:`EOFError`.
+
+   .. attribute:: expected
+
+      The total number (:class:`int`) of expected bytes.
+
+   .. attribute:: partial
+
+      A string of :class:`bytes` read before the end of stream was reached.
+
+
+.. exception:: LimitOverrunError
+
+   Reached the buffer size limit while looking for a separator.
+
+   Raised by the :ref:`asyncio stream APIs <asyncio-streams>`.
+
+   .. attribute:: consumed
+
+      The total number of to be consumed bytes.