python生成指定长度的随机数密码

#导入random和string模块
import random, string

def GenPassword(length):
#随机出数字的个数
numOfNum = random.randint(1,length-1)
numOfLetter = length - numOfNum
#选中numOfNum个数字
slcNum = [random.choice(string.digits) for i in range(numOfNum)]
#选中numOfLetter个字母
slcLetter = [random.choice(string.ascii_letters) for i in range(numOfLetter)]
#打乱这个组合
slcChar = slcNum + slcLetter
random.shuffle(slcChar)
#生成密码
genPwd = ''.join([i for i in slcChar])
return genPwd

if __name__ == '__main__':
print GenPassword(6)