[issue40346] Redesign random.Random class inheritance

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Attached PR 19631 adds random.BaseRandom. random.SystemRandom now inherits from BaseRandom and so no longer inherits from _random.Random: an instance now only takes 48 bytes of memory, rather than 2568 bytes (on x86-64).

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40346>
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