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=============================================
``gevent.hub`` - The Event Loop and the Hub
=============================================
.. module:: gevent.hub
The hub is a special greenlet created automatically to run the event loop.
The current hub can be retrieved with `get_hub`.
.. autofunction:: get_hub
.. autoclass:: Hub
:members:
.. automethod:: wait
.. automethod:: cancel_wait
.. attribute:: loop
the event loop object (`ILoop`) associated with this hub and thus
this native thread.
The Event Loop
==============
The current event loop can be obtained with ``get_hub().loop``.
All implementations of the loop provide a common minimum interface.
.. autointerface:: gevent._interfaces.ILoop
.. autointerface:: gevent._interfaces.IWatcher
.. autointerface:: gevent._interfaces.ICallback
Utilities
=========
.. autoclass:: Waiter
Exceptions
==========
.. autoclass:: LoopExit
The following exceptions *are not* expected to be thrown and *are not*
meant to be caught; if they are raised to user code it is generally a
serious programming error or a bug in gevent, greenlet, or its event
loop implementation. They are presented here for documentation
purposes only.
.. autoclass:: gevent.exceptions.ConcurrentObjectUseError
.. autoclass:: gevent.exceptions.BlockingSwitchOutError
.. autoclass:: gevent.exceptions.InvalidSwitchError
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