Check if a string contains only given characters

Question

I\'m wondering if there is more elegant way to check if the string (str = \'abcccbbaabcbca\') contains only \'a\',\'b\' or \'c\' than iterating over it :

for         


        

Answer 1

Using regular expressions:

import re
if re.search('[^abc]', string):
    print('wrong character')