Yanz mini Shell

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.

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