bpo-31065: Add doc about Popen.poll returns None.#3169
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gpshead merged 1 commit intopython:masterfrom Aug 29, 2017
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| Check if child process has terminated. Set and return | ||
| :attr:`~Popen.returncode` attribute. | ||
| :attr:`~Popen.returncode` attribute. Otherwise, returns ``None``. |
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Elsewhere Popen.returncode is already documented to be None when the process hasn't terminated. But it does not hurt to also make that clear here.
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(cherry picked from commit 006617f)
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See https://bugs.python.org/issue31065 for more details.
https://bugs.python.org/issue31065