python生成随机数的两种方法

from random import Random
chars = 'abcdefghijklmnopqrstuvwxyz0123456789'
random = Random()
print("".join([chars[random.randint(0, len(chars) - 1)] for i in range(30)]))


import string
print(''.join(random.sample(string.ascii_letters + string.digits, 32)))