How can I check if a string contains ANY letters from the alphabet?

Question

What is best pure Python implementation to check if a string contains ANY letters from the alphabet?

string_1 = "(555).555-5555" string_2 = "(555) 555 - 5555 ext. 5555 

Where string_1 would return False for having no letters of the alphabet in it and string_2 would return True for having letter.

Answer 1

Regex should be a fast approach:

re.search('[a-zA-Z]', the_string) 

Answer 2

How about:

>>> string_1 = "(555).555-5555" >>> string_2 = "(555) 555 - 5555 ext. 5555" >>> any(c.isalpha() for c in string_1) False >>> any(c.isalpha() for c in string_2) True