DOC: Dict of Dicts for renaming Groupby Aggregations · Issue #9052 · pandas-dev/pandas (original) (raw)

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Description

I didn't realize this was possible, and didn't see it in the docs.

df = pd.DataFrame({'A': [1, 2, 3], 'B': ['a', 'a', 'b'], 'C': [3, 4, 5]})
df.groupby('B').agg({'A': {'mean1': 'mean', 'med1': 'median'}, 'C': {'mean2': 'mean', 'med2': 'median'}})