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docs/library/sys: Add documentation for sys.atexit function.

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Damien George 2019-08-15 17:42:38 +10:00
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docs/library/sys.rst
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@ -15,6 +15,19 @@ Functions
function raise as `SystemExit` exception. If an argument is given, its function raise as `SystemExit` exception. If an argument is given, its
value given as an argument to `SystemExit`. value given as an argument to `SystemExit`.
.. function:: atexit(func)
Register *func* to be called upon termination. *func* must be a callable
that takes no arguments, or ``None`` to disable the call. The ``atexit``
function will return the previous value set by this function, which is
initially ``None``.
.. admonition:: Difference to CPython
:class: attention
This function is a MicroPython extension intended to provide similar
functionality to the :mod:`atexit` module in CPython.
.. function:: print_exception(exc, file=sys.stdout) .. function:: print_exception(exc, file=sys.stdout)
Print exception with a traceback to a file-like object *file* (or Print exception with a traceback to a file-like object *file* (or