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2 changes: 1 addition & 1 deletion pandas/core/base.py
Original file line number Diff line number Diff line change
Expand Up @@ -556,7 +556,7 @@ def is_any_frame():
# we require a list, but not an 'str'
return self._aggregate_multiple_funcs(arg,
_level=_level,
_axis=_axis), None
_axis=_axis), True
else:
result = None

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