QST：pandas.groupby().diff()

[zybmiximixi]

Research

• I have searched the [pandas] tag on StackOverflow for similar questions.

• I have asked my usage related question on StackOverflow.

Link to question on StackOverflow

https://stackoverflow.com/questions/78178582/pandas-for-groupby-diff

Question about pandas

The groupby().diff() operation of pandas does not comply with the default as_index=True parameter and does not use the keys in groupby as indexes. Is this what is the reason.

[rhshadrach]

Thanks for the report - the as_index argument is documented as:

This argument has no effect on filtrations (see the filtrations in the user guide), such as head(), tail(), nth() and in transformations (see the transformations in the user guide).

.diff is a transformation. Closing.