str.
islower
Check whether all characters in each string are lowercase.
This is equivalent to running the Python string method str.islower() for each element of the Series/Index. If a string has zero characters, False is returned for that check.
str.islower()
Examples
>>> s = ps.Series(['leopard', 'Golden Eagle', 'SNAKE', '']) >>> s.str.islower() 0 True 1 False 2 False 3 False dtype: bool