str.islower() → pyspark.pandas.series.Series

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.


>>> s = ps.Series(['leopard', 'Golden Eagle', 'SNAKE', ''])
>>> s.str.islower()
0     True
1    False
2    False
3    False
dtype: bool