bpo-32670: Enforce PEP 479. (#5327)

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Yury Selivanov 2018-01-26 15:24:24 -05:00 committed by GitHub
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@ -367,17 +367,21 @@ The following exceptions are the exceptions that are usually raised.
raised, and the value returned by the function is used as the
:attr:`value` parameter to the constructor of the exception.
If a generator function defined in the presence of a ``from __future__
import generator_stop`` directive raises :exc:`StopIteration`, it will be
converted into a :exc:`RuntimeError` (retaining the :exc:`StopIteration`
as the new exception's cause).
If a generator code directly or indirectly raises :exc:`StopIteration`,
it is converted into a :exc:`RuntimeError` (retaining the
:exc:`StopIteration` as the new exception's cause).
.. versionchanged:: 3.3
Added ``value`` attribute and the ability for generator functions to
use it to return a value.
.. versionchanged:: 3.5
Introduced the RuntimeError transformation.
Introduced the RuntimeError transformation via
``from __future__ import generator_stop``, see :pep:`479`.
.. versionchanged:: 3.7
Enable :pep:`479` for all code by default: a :exc:`StopIteration`
error raised in a generator is transformed into a :exc:`RuntimeError`.
.. exception:: StopAsyncIteration