[issue27181] Add geometric mean to `statistics` module

[Roundup Robot]

Roundup Robot added the comment:

New changeset 9eb5edfcf604 by Steven D'Aprano in branch 'default':
Issue27181 add geometric mean.
https://hg.python.org/cpython/rev/9eb5edfcf604

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nosy: +python-dev

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27181>
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