Python检测密码是否符合要求，大小写字母数字长度等密码必须包含超过8个字符，且不超过16个字符。密码必须包含至少一个数字、一个大写字母和一个小写字母。密码必须包含多个非字母数字字符。-Toy模板网

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要使密码更强大，它需要满足以下四个规则：

. 密码必须包含超过8个字符，且不超过16个字符。“

提示：查找密码字符串的长度，您应该使用len（）方法。

密码必须包含至少一个数字、一个大写字母和一个小写字母。
密码必须包含多个非字母数字字符。

第一种方式是使用函数

if len(a) > 16 or len(a) < 8:
    print(a + "is not of valid length " + str(len(a)))
    isOk = 0
else:
    print(a + "is of valid length " + str(len(a)))
print("Check rule 2")
# Set the function
lowercases = 0
uppercases = 0
digits = 0
alpha = 0
# Find, detect output upper and lower case alphanumeric
for char in a:
    if char.islower():
        lowercases += 1
    elif char.isupper():
        uppercases += 1
    elif char.isdigit():
        digits += 1
print("Number of lowercase is: " + str(lowercases))
print("Number of uppercase is: " + str(uppercases))
print("Number of digit is: " + str(digits))
if lowercases == 0 or uppercases == 0 or digits == 0:
    print(a + " does not contain enough of each type of character")
    isOk = 0
else:
    print(a + " contain enough of each type of character")
print("check rule 3")
# Detecting special characters
if alpha != 0:
    print(a + " contain non-alpha-numeric")
else:
    print(a + " does not contain non-alphanumeric")
    isOk = 0
print("Check for all the rules")
if isOk:
    print("Overall " + a + " isvalid")

第二种最简单的方法文章来源地址https://www.toymoban.com/news/detail-448593.html

def password_check(passwd):
    SpecialSym = ['$', '@', '#', '%', '@', '!', '&', '=', '+', '_', '-', '$', '/', ]
    val = True
# check the length
    if len(passwd) < 8:
        print('length should be at > 8')
        val = False
    else:
        print('length is than 8 ')

    if len(passwd) > 16:
        print('length should be not be least than 16')
        val = False
    else:
        print('length is least than 16')
# check the number
    if not any(char.isdigit() for char in passwd):
        print('Password should have at least one numeral')
        val = False
    else:
        print('password have least one numeral')

# check the uppercase
    if not any(char.isupper() for char in passwd):
        print('Password should have at least one uppercase letter')
        val = False
    else:
        print('Password have at least one uppercase letter')
# check the lowercase
    if not any(char.islower() for char in passwd):
        print('Password should have at least one lowercase letter')
        val = False
    else:
        print('Password have least one lowercase letter')
# check the Special characters
    if not any(char in SpecialSym for char in passwd):
        print('Password should have at least one of the symbols $@#')
        val = False
    else:
        print('Password have least one of the symbols $@#')
    if val:
        return val


def main():

    if password_check(password):

        print('Password is valid')
    else:
        print("Invalid Password !!")


# Driver Code
if __name__ == '__main__':
    password = input('Enter your password: ')
    main()

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