Python生成随机密码

import random
M = int(input("请输入需要生成的密码个数："))
N = int(input("请输入密码的位数："))

#提前设定的密码取值范围
codes = 'abcdefghijklimnopqrstuvwxyz' + 'ABCDEFGHIJKLMNOPQRSTUVWSYZ' + '0123456789'
codeCount = len(codes)
passwords = []
num = 0
while num< M:
      pas = random.sample(codes ,N)
      num += 1
      st = ','.join(pas)
      print(st.replace(',', ''))