pandas.Series.str.lower#

Series.str.lower()[source]#

Convert strings in the Series/Index to lowercase.

Equivalent to str.lower().

Returns:

Series or Index of objects: A Series or Index where the strings are modified by 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: object

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

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

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

>>> s.str.capitalize()
0                 Lower
1              Capitals
2    This is a sentence
3              Swapcase
dtype: object

>>> s.str.swapcase()
0                 LOWER
1              capitals
2    THIS IS A SENTENCE
3              sWaPcAsE
dtype: object