Python 3 reference · String Methods

Python String isalpha() Method

Return True if every character is a letter (in any alphabet) and the string isn't empty. Spaces and digits return False.

Syntax

str.isalpha()

True or False.

Which strings are letters only?Try it yourself

for s in ["Python", "Py3", "naïve", "two words", ""]:
    print(repr(s), s.isalpha())

Output

'Python' True
'Py3' False
'naïve' True
'two words' False
'' False

Check each wordTry it yourself

name = "Mary Jane"
print(all(part.isalpha() for part in name.split()))

Output

True

Version	Change
Python 3.0	Added

str.isalnum() · Return True if every character is a letter or a digit and the string isn't empty.
str.isascii() · Return True if the string is empty or every character is ASCII (code points 0–127).
str.isspace() · Return True if every character is whitespace (spaces, tabs, newlines) and the string isn't empty.
Python Strings · tutorial