import re
def textregex(passwd):
textupper = re.compile(r'[A-Z]')
textlower = re.compile(r'[a-z]')
textnum = re.compile(r'[0-9]')
if len(passwd) < 8:
print('长度不足8,请重新输入')
elif not textupper.search(passwd):
print("缺大写")
elif not textlower.search(passwd):
print("缺小写")
elif not textnum.search(passwd):
print("缺数字")
else:
print("OK")
passwd = input("请输入你的密码")
textregex(passwd)