[issue27266] Always use getrandom() in os.random() on Linux and add block=False parameter to os.urandom()

[STINNER Victor]

STINNER Victor added the comment:

If you didn't read it yet, I suggest you to read my summary of the issue #26839 which contains a lot of information on RNG in the case of Python:
http://haypo-notes.readthedocs.io/pep_random.html

It can be used to write a real PEP.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27266>
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