Python 3.3::

    >>> import sys
    >>> print(sys.exit.__doc__)
    exit([status])

    Exit the interpreter by raising SystemExit(status).
    If the status is omitted or None, it defaults to zero (i.e., success).
    If the status is numeric, it will be used as the system exit status.
    If it is another kind of object, it will be printed and the system
    exit status will be one (i.e., failure).

The sentence "If the status is numeric, it will be used as the system exit status."
is wrong::

    >>> sys.exit(3.33)
    3.33
    $ echo $?
    1


It should be "If the status is an *integer*, it will be used as the system exit status.",
as specified in the SystemExit `doc`.

.. doc: http://docs.python.org/3/library/exceptions.html#SystemExit

New changeset 187a678c6033 by Ezio Melotti in branch '2.7':
#18839: document that sys.exit() will not accept a non-integer numeric value as exit status.
http://hg.python.org/cpython/rev/187a678c6033

New changeset 694e50a79638 by Ezio Melotti in branch '3.3':
#18839: document that sys.exit() will not accept a non-integer numeric value as exit status.
http://hg.python.org/cpython/rev/694e50a79638

New changeset 6cb3ae431bef by Ezio Melotti in branch 'default':
#18839: merge with 3.3.
http://hg.python.org/cpython/rev/6cb3ae431bef

Fixed, thanks for the report!