随机密码生成

import sys
import string
import secrets
 
alphabet = string.ascii_letters + string.digits
punctuation = string.punctuation
 
def random_passwd(length=18):
  """随机生成指定位数的密码"""
 
  passwd_table = alphabet + punctuation
 
  while True:
      passwd = ''.join(secrets.choice(passwd_table) for i in range(length))
      if (any(p.islower() for p in passwd) and \
          any(p.isupper() for p in passwd) and \
          any(p in passwd for p in punctuation) and \
          sum(p.isdigit() for p in passwd) >= 3):
 
          return passwd
 
if __name__ == '__main__':
  length = int(sys.argv[1])
  passwd = random_passwd(length)
  print(f'\n{length}位随机密码: {passwd}')