BUG: passing kwargs to Series.aggregate raises TypeError: f() got an unexpected keyword argument · Issue #43357 · pandas-dev/pandas (original) (raw)

I have checked that this issue has not already been reported.
I have confirmed this bug exists on the latest version of pandas. The bug is present on 1.3.0, 1.3.1 and 1.3.2 but not 1.2.5.
(optional) I have confirmed this bug exists on the master branch of pandas.

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Code Sample, a copy-pastable example

#!/usr/bin/env python

import pandas as pd

def func(a, b, c=2): pass

if name == "main": s = pd.Series([1, 2, 3, 4])

s.aggregate(func, 0, 99, c=101)

Problem description

Prior to Pandas 1.3.0, it was possible to pass kwargs when using Series.aggregate, however it appears that Pandas now attempts to apply the arguments and keyword arguments twice (first currying them then using them to call the curried function).

Expected Output

Expect output is the program running normally and not throwing an exception.

Actual Output

Traceback (most recent call last): File "/home/jake/pandas-env/lib/python3.9/site-packages/pandas/core/apply.py", line 1068, in agg result = self.obj.apply(f, *args, **kwargs) File "/home/jake/pandas-env/lib/python3.9/site-packages/pandas/core/series.py", line 4357, in apply return SeriesApply(self, func, convert_dtype, args, kwargs).apply() File "/home/jake/pandas-env/lib/python3.9/site-packages/pandas/core/apply.py", line 1043, in apply return self.apply_standard() File "/home/jake/pandas-env/lib/python3.9/site-packages/pandas/core/apply.py", line 1099, in apply_standard mapped = lib.map_infer( File "pandas/_libs/lib.pyx", line 2859, in pandas._libs.lib.map_infer File "/home/jake/pandas-env/lib/python3.9/site-packages/pandas/core/apply.py", line 131, in f return func(x, *args, **kwargs) TypeError: f() got an unexpected keyword argument 'c'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/home/jake/./pd_test.py", line 11, in s.aggregate(func, 0, 99, c=101) File "/home/jake/pandas-env/lib/python3.9/site-packages/pandas/core/series.py", line 4227, in aggregate result = op.agg() File "/home/jake/pandas-env/lib/python3.9/site-packages/pandas/core/apply.py", line 1070, in agg result = f(self.obj, *args, **kwargs) TypeError: f() got an unexpected keyword argument 'c'

Output of `pd.show_versions()`