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# pandas.core.groupby.SeriesGroupBy.skew

SeriesGroupBy.skew(axis=<no_default>, skipna=True, numeric_only=False, **kwargs)

  Return unbiased skew within groups.

  Normalized by N-1.

  Parameters:
    axis{0 or ‘index’, 1 or ‘columns’, None}, default 0

      Axis for the function to be applied on. This parameter is only for compatibility with DataFrame and is unused.

      Deprecated since version 2.1.0: For axis=1, operate on the underlying object instead. Otherwise the axis keyword is not necessary.

    skipnabool, default True

      Exclude NA/null values when computing the result.

    numeric_onlybool, default False

      Include only float, int, boolean columns. Not implemented for Series.

    **kwargs

      Additional keyword arguments to be passed to the function.

  Returns:
    Series

  See also

  `Series.skew`

    Return unbiased skew over requested axis.

  Examples

      >>> ser = pd.Series([390., 350., 357., np.nan, 22., 20., 30.],
      ...                 index=['Falcon', 'Falcon', 'Falcon', 'Falcon',
      ...                        'Parrot', 'Parrot', 'Parrot'],
      ...                 name="Max Speed")
      >>> ser
      Falcon    390.0
      Falcon    350.0
      Falcon    357.0
      Falcon      NaN
      Parrot     22.0
      Parrot     20.0
      Parrot     30.0
      Name: Max Speed, dtype: float64
      >>> ser.groupby(level=0).skew()
      Falcon    1.525174
      Parrot    1.457863
      Name: Max Speed, dtype: float64
      >>> ser.groupby(level=0).skew(skipna=False)
      Falcon         NaN
      Parrot    1.457863
      Name: Max Speed, dtype: float64