pandas.api.typing.DataFrameGroupBy.tail

DataFrameGroupBy.tail(n=5)

Return last n rows of each group.

Similar to .apply(lambda x: x.tail(n)), but it returns a subset of rows from the original DataFrame with original index and order preserved (as_index flag is ignored).

Parameters:

nint

If positive: number of entries to include from end of each group. If negative: number of entries to exclude from start of each group.

Returns:

Series or DataFrame

Subset of original Series or DataFrame as determined by n.

See also

Series.groupby

Apply a function groupby to a Series.

DataFrame.groupby

Apply a function groupby to each row or column of a DataFrame.

Examples

>>> df = pd.DataFrame(
...     [["a", 1], ["a", 2], ["b", 1], ["b", 2]], columns=["A", "B"]
... )
>>> df.groupby("A").tail(1)
   A  B
1  a  2
3  b  2
>>> df.groupby("A").tail(-1)
   A  B
1  a  2
3  b  2