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# pandas.Series.filter

Series.filter(items=None, like=None, regex=None, axis=None)

  Subset the DataFrame or Series according to the specified index labels.

  For DataFrame, filter rows or columns depending on `axis` argument. Note that this routine does not filter based on content. The filter is applied to the labels of the index.

  Parameters:
    items list-like

      Keep labels from axis which are in items.

    like str

      Keep labels from axis for which “like in label == True”.

    regex str (regular expression)

      Keep labels from axis for which re.search(regex, label) == True.

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

      The axis to filter on, expressed either as an index (int) or axis name (str). By default this is the info axis, ‘columns’ for `DataFrame`. For `Series` this parameter is unused and defaults to `None`.

  Returns:
    Same type as caller

      The filtered subset of the DataFrame or Series.

  See also

  `DataFrame.loc`

    Access a group of rows and columns by label(s) or a boolean array.

  Notes

  The `items`, `like`, and `regex` parameters are enforced to be mutually exclusive.

  `axis` defaults to the info axis that is used when indexing with `[]`.

  Examples

      >>> df = pd.DataFrame(
      ...     np.array(([1, 2, 3], [4, 5, 6])),
      ...     index=["mouse", "rabbit"],
      ...     columns=["one", "two", "three"],
      ... )
      >>> df
              one  two  three
      mouse     1    2      3
      rabbit    4    5      6

      >>> # select columns by name
      >>> df.filter(items=["one", "three"])
               one  three
      mouse     1      3
      rabbit    4      6

      >>> # select columns by regular expression
      >>> df.filter(regex="e$", axis=1)
               one  three
      mouse     1      3
      rabbit    4      6

      >>> # select rows containing 'bbi'
      >>> df.filter(like="bbi", axis=0)
               one  two  three
      rabbit    4    5      6