[issue39094] Add a default to statistics.mean and related functions

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:

I vote -1.  We don't have defaults for stdev() or median() or mode().  And it isn't clear what one would use for a meaningful default value in most cases.  Also, I'm not seeing anything like this in Pandas, Excel, etc.  So, I recommend keeping the current simple and clean APIs.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39094>
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