Python有关字符串的问题，Rule2的循环不知道怎么写：

Question

Python有关字符串的问题，Rule2的循环不知道怎么写：

Answer 1

可以用正则表达式或者直接遍历一个个判断。

def checkPasswd(passwd):
  n1=0
  n2=0
  n3=0
  if len(passwd)<8:
    return False
  for c in passwd:
    if c.isdigit():
      n1=n1+1
    elif c.isupper():
      n2=n2+1
    elif c.islower():
      n3=n3+1
    else:
      return False
  if n1>0 and n2>0 and n3>0:
    return True
  else:
    return False


print(checkPasswd("aA12331222"))
print(checkPasswd("aA123"))
print(checkPasswd("bbb1212121"))
print(checkPasswd("AAaa123***"))