ers in each string are %(type)s. This is equivalent to running the Python string method :meth:`str.%(method)s` 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 -------- Series.str.isalpha : Check whether all characters are alphabetic. Series.str.isnumeric : Check whether all characters are numeric. Series.str.isalnum : Check whether all characters are alphanumeric. Series.str.isdigit : Check whether all characters are digits. Series.str.isdecimal : Check whether all characters are decimal. Series.str.isspace : Check whether all characters are whitespace. Series.str.islower : Check whether all characters are lowercase. Series.str.isupper : Check whether all characters are uppercase. Series.str.istitle : Check whether all characters are titlecase. Examples -------- **Checks for Alphabetic and Numeric Characters** >>> s1 = pd.Series(['one', 'one1', '1', '']) >>> s1.str.isalpha() 0 True 1 False 2 False 3 False dtype: bool >>> s1.str.isnumeric() 0 False 1 False 2 True 3 False dtype: bool >>> s1.str.isalnum() 0 True 1 True 2 True 3 False dtype: bool Note that checks against characters mixed with any additional punctuation or whitespace will evaluate to false for an alphanumeric check. >>> s2 = pd.Series(['A B', '1.5', '3,000']) >>> s2.str.isalnum() 0 False 1 False 2 False dtype: bool **More Detailed Checks for Numeric Characters** There are several different but overlapping sets of numeric characters that can be checked for. >>> s3 = pd.Series(['23', '³', 'â…•', '']) The ``s3.str.isdecimal`` method checks for characters used to form numbers in base 10. >>> s3.str.isdecimal() 0 True 1 False 2 False 3 False dtype: bool The ``s.str.isdigit`` method is the same as ``s3.str.isdecimal`` but also includes special digits, like superscripted and subscripted digits in unicode. >>> s3.str.isdigit() 0 True 1 True 2 False 3 False dtype: bool The ``s.str.isnumeric`` method is the same as ``s3.str.isdigit`` but also includes other characters that can represent quantities such as unicode fractions. >>> s3.str.isnumeric() 0 True 1 True 2 True 3 False dtype: bool **Checks for Whitespace** >>> s4 = pd.Series([' ', '\t\r\n ', '']) >>> s4.str.isspace() 0 True 1 True 2 False dtype: bool **Checks for Character Case** >>> s5 = pd.Series(['leopard', 'Golden Eagle', 'SNAKE', '']) >>> s5.str.islower() 0 True 1 False 2 False 3 False dtype: bool >>> s5.str.isupper() 0 False 1 False 2 True 3 False dtype: bool The ``s5.str.istitle`` method checks for whether all words are in title case (whether only the first letter of each word is capitalized). Words are assumed to be as any sequence of non-numeric characters separated by whitespace characters. >>> s5.str.istitle() 0 False 1 True 2 False 3 False dtype: bool Ú ismethodsÚ