Method lower

pandas/core/strings/accessor.py:3850–3919

Convert strings in the Series/Index to lowercase. Equivalent to :meth:`str.lower`. Returns ------- Series or Index of objects A Series or Index where the strings are modified by :meth:`str.lower`. See Also -------- Serie

(self)

    @forbid_nonstring_types(["bytes"])
    def lower(self):
        """
        Convert strings in the Series/Index to lowercase.

        Equivalent to :meth:`str.lower`.

        Returns
        -------
        Series or Index of objects
            A Series or Index where the strings are modified by :meth:`str.lower`.

        See Also
        --------
        Series.str.lower : Converts all characters to lowercase.
        Series.str.upper : Converts all characters to uppercase.
        Series.str.title : Converts first character of each word to uppercase and
            remaining to lowercase.
        Series.str.capitalize : Converts first character to uppercase and
            remaining to lowercase.
        Series.str.swapcase : Converts uppercase to lowercase and lowercase to
            uppercase.
        Series.str.casefold: Removes all case distinctions in the string.

        Examples
        --------
        >>> s = pd.Series(["lower", "CAPITALS", "this is a sentence", "SwApCaSe"])
        >>> s
        0                 lower
        1              CAPITALS
        2    this is a sentence
        3              SwApCaSe
        dtype: str

        >>> s.str.lower()
        0                 lower
        1              capitals
        2    this is a sentence
        3              swapcase
        dtype: str

        >>> s.str.upper()
        0                 LOWER
        1              CAPITALS
        2    THIS IS A SENTENCE
        3              SWAPCASE
        dtype: str

        >>> s.str.title()
        0                 Lower
        1              Capitals
        2    This Is A Sentence
        3              Swapcase
        dtype: str

        >>> s.str.capitalize()
        0                 Lower
        1              Capitals
        2    This is a sentence