pandas.Series.str.lower

Series.str.lower()

Convert strings in the Series/Index to lowercase.

Equivalent to str.lower().

Returns

Series/Index of objects

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