[issue27181] Add geometric mean to `statistics` module

[Ram Rachum]

Ram Rachum added the comment:

Thanks for the patch Steven! I won't comment about the code because I don't know enough about these algorithms, but I'm thinking, since you also did a refactoring of the statistics module, maybe these should be two separate patches/commits so it'll be easy to see which part is the new feature and which part is moving existing code around?

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