Add AsyncContextManager generic class #438
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gvanrossum
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Jun 9, 2017
| yield 42 | ||
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| cm = manager() | ||
| self.assertNotIsInstance(cm, typing.AsyncContextManager) |
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I'd add a test that also serves as an example of how to use AsyncContextManager (presumably in async with ...?
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I was planning to do this after AbstractAsyncContextManager is merged into CPython (python/cpython#1412), but there's really no need to wait. The code looks good to me. It would be nice if this can make it into 3.6.2. |
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Thanks! |
JelleZijlstra
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Jun 24, 2017
Implements: - python/typing#438 - python/cpython#360 python/cpython#1412, which adds contextlib.AbstractAsyncContextManager, has not yet been merged.
gvanrossum
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Jun 27, 2017
) Implements: - python/typing#438 - python/cpython#360 Note that python/cpython#1412, which adds contextlib.AbstractAsyncContextManager, has not yet been merged.
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Asynchronous context managers are defined by PEP 492, but there is no corresponding generic abstract class in
typing. This PR adds it for Python 3.5+.