8000 ENH: Allow the groupby by param to handle columns and index levels (GH5677) by jonmmease · Pull Request #14432 · pandas-dev/pandas · GitHub
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ENH: Allow the groupby by param to handle columns and index levels (GH5677) #14432

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Merged
jorisvandenbossche merged 8 commits into from
Dec 14, 2016
Merged

ENH: Allow the groupby by param to handle columns and index levels (GH5677) #14432

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eb1e63f
Added test cases for GH 5677
Oct 3, 2016
355d709
Implemented GH 5677
Oct 13, 2016
b050aca
Documentation updates for GH 5677
Oct 13, 2016
5f93ddd
Added future warning on ambiguous case (GH 5677)
Oct 27, 2016
5325ee6
Indentation fix
Oct 27, 2016
b68af16
Added note explaining version 0.20 change and ambiguity resolution / …
Oct 27, 2016
98af4d7
Added example for grouping by combination of index level and column
Nov 5, 2016
2d35461
shorten test names
jorisvandenbossche Dec 14, 2016
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Implemented GH 5677
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Jon M. Mease committed Nov 18, 2016
commit 355d70904fe2f5fc82826d58eca78e2dfaa6435e
9 changes: 7 additions & 2 deletions pandas/core/groupby.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2449,8 +2449,13 @@ def is_in_obj(gpr):
exclusions.append(name)

elif is_in_axis(gpr): # df.groupby('name')
in_axis, name, gpr = True, gpr, obj[gpr]
exclusions.append(name)
if gpr in obj:
in_axis, name, gpr = True, gpr, obj[gpr]
exclusions.append(name)
elif gpr in obj.index.names:
in_axis, name, level, gpr = False, None, gpr, None
else:
raise KeyError(gpr)
elif isinstance(gpr, Grouper) and gpr.key is not None:
# Add key to exclusions
exclusions.append(gpr.key)
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