pandas.errors.UnsupportedFunctionCall

exception pandas.errors.UnsupportedFunctionCall

Exception raised when attempting to call a unsupported numpy function.

For example, np.cumsum(groupby_object).

See also

DataFrame.groupby

Group DataFrame using a mapper or by a Series of columns.

Series.groupby

Group Series using a mapper or by a Series of columns.

core.groupby.GroupBy.cumsum

Compute cumulative sum for each group.

Examples

>>> df = pd.DataFrame(
...     {"A": [0, 0, 1, 1], "B": ["x", "x", "z", "y"], "C": [1, 2, 3, 4]}
... )
>>> np.cumsum(df.groupby(["A"]))
Traceback (most recent call last):
UnsupportedFunctionCall: numpy operations are not valid with groupby.
Use .groupby(...).cumsum() instead