cudf.core.column.string.StringMethods.islower#

StringMethods.islower() → SeriesOrIndex[source]#

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.

Returns:

Series or Index of bool: Series or Index of boolean values with the same length as the original Series/Index.

See also

isalnum: Check whether all characters are alphanumeric.
isalpha: Check whether all characters are alphabetic.
isdecimal: Check whether all characters are decimal.
isdigit: Check whether all characters are digits.
isinteger: Check whether all characters are integer.
isnumeric: Check whether all characters are numeric.
isfloat: Check whether all characters are float.
isspace: Check whether all characters are whitespace.
isupper: Check whether all characters are uppercase.

Examples

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