Question

I need to check if string contains only predefined list of symbols and doing something like:

my_string = 'qwer123asd!@#$%^'
tmp = str.maketrans({'0': None, 'x': None, '#': None, '$': None, 'q': None, 'i': None})
if my_string.translate(tmp) == '':
    print("Only predefined symbols!")

Is there a better way to achieve this?

Answer 1

my_string = 'qwer123asd!@#$%^'
predef = set('0x#$qi')

if set(my_string).issubset(predef):
    print "only predefined symbols"