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BUG: groupby mean/median/var should always be float values #41137

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rhshadrach opened this issue Apr 24, 2021 · 0 comments · Fixed by #41139
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BUG: groupby mean/median/var should always be float values #41137

rhshadrach opened this issue Apr 24, 2021 · 0 comments · Fixed by #41139
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@rhshadrach
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Bug Dtype Conversions Unexpected or buggy dtype conversions Groupby
Milestone
1.3

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@rhshadrach
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This is value-dependent behavior:

print(DataFrame({'a': [1, 3]}).groupby([1, 1]).mean())

results in the integer 2, whereas

print(DataFrame({'a': [1, 3]}).mean())

results in 2.0.
@rhshadrach rhshadrach added Bug Groupby Dtype Conversions Unexpected or buggy dtype conversions labels Apr 24, 2021
@rhshadrach rhshadrach self-assigned this Apr 24, 2021
@rhshadrach rhshadrach added API - Consistency Internal Consistency of API/Behavior and removed API - Consistency Internal Consistency of API/Behavior labels Apr 24, 2021
This was referenced Apr 24, 2021
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@jreback jreback added this to the 1.3 milestone May 6, 2021
@ppletscher ppletscher mentioned this issue May 31, 2021
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@rhshadrach rhshadrach

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Bug Dtype Conversions Unexpected or buggy dtype conversions Groupby
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BUG: groupby sum, mean, var should always be floats rhshadrach/pandas
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@jreback @rhshadrach