A simple and straightforward password generator that produces alphanumeric random strings of length ten omitting those characters that are easily confused with each other in various fonts. Ensures at least one character will be a numeral.

password_generator.py

#!/usr/bin/env python
from string import letters, digits
from random import choice


# Get a list of unambiguous ASCII characters.  (It must be a list as
# sets don't work with random.choice().)
chars = list(set(letters + digits) - set('oO0I1lB8S5b6'))


def _pwgen(n=10):
    return ''.join(choice(chars) for _ in range(n))


def pwgen(n=10):
    pw = ''
    while not any(ch in digits for ch in pw):
        pw = _pwgen(n)
    return pw


if __name__ == '__main__':
    print pwgen()