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# pandas.DataFrame.filter

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

  Subset the dataframe rows or columns according to the specified index labels.

  Note that this routine does not filter a dataframe on its contents. The filter is applied to the labels of the index.

  Parameters:
    itemslist-like

      Keep labels from axis which are in items.

    likestr

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

    regexstr (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 input object

  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