Message 307888 - Python tracker

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Author	asvetlov
Recipients	asvetlov, serhiy.storchaka, yselivanov
Date	2017-12-09.09:48:55
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1512812935.73.0.213398074469.issue32253@psf.upfronthosting.co.za>
In-reply-to

Content
1. asyncio is not supported by 2.7 anyway 2. with (yield from lock) is based on very non-obvious tricks: a) lock.__enter__ is forbidden and raises RuntimeError b) actually lock.__iter__ is called for lock acquiring before calling `with` c) the object returned from __iter__ is a context manager with __enter__/__exit__ methods 3. asyncio is converted to async/await syntax by https://bugs.python.org/issue32193 (old `yield from` style is fully supported still). 4. the deprecation was proposed by Yury Selivanov in https://github.com/python/cpython/pull/4753#discussion_r155658200

1. asyncio is not supported by 2.7 anyway
2. with (yield from lock) is based on very non-obvious tricks:
  a) lock.__enter__ is forbidden and raises RuntimeError
  b) actually lock.__iter__ is called for lock acquiring *before* calling `with`
  c) the object returned from __iter__ is a context manager with __enter__/__exit__ methods
3. asyncio is converted to async/await syntax by https://bugs.python.org/issue32193 (old `yield from` style is fully supported still).
4. the deprecation was proposed by Yury Selivanov in https://github.com/python/cpython/pull/4753#discussion_r155658200

History
Date	User	Action	Args
2017-12-09 09:48:55	asvetlov	set	recipients: + asvetlov, serhiy.storchaka, yselivanov
2017-12-09 09:48:55	asvetlov	set	messageid: <1512812935.73.0.213398074469.issue32253@psf.upfronthosting.co.za>
2017-12-09 09:48:55	asvetlov	link	issue32253 messages
2017-12-09 09:48:55	asvetlov	create