generate random string python

import random
import string

def random_string_generator(str_size, allowed_chars):
    return ''.join(random.choice(allowed_chars) for x in range(str_size))

chars = string.ascii_letters + string.punctuation
size = 12

print(chars)
print('Random String of length 12 =', random_string_generator(size, chars))

''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(N))