[issue4972] let's equip ftplib.FTP with __enter__ and __exit__

[Stuart Axon]

Stuart Axon <stu.axon at gmail.com> added the comment:

zipfile also would make a good target for a contextmanager (as noted here -
http://tarekziade.wordpress.com/2009/01/20/python-standard-lib-give-me-more-withs/
)

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nosy: +stuaxo

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4972>
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