[issue38008] ContextManager and AsyncContextManager protocols can't be subclassed

[Ivan Levkivskyi]

Ivan Levkivskyi <levkivskyi at gmail.com> added the comment:


New changeset 692a0dc91597b7fb350383b633dc4d044cbd360e by Ivan Levkivskyi (Divij Rajkumar) in branch 'master':
bpo-38008: Move builtin protocol whitelist to mapping instead of list (GH-15647)
https://github.com/python/cpython/commit/692a0dc91597b7fb350383b633dc4d044cbd360e


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<https://bugs.python.org/issue38008>
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