0429---每日习题 菲薄纳西数列 正则ip匹配

def fib(n):
    if n==1 or n==2:
        return 1
    return fib(n-1)+fib(n-2)

for i in range(1,9):
    print(fib(i))

def check_ipv4_addr(ipAddr):
    addr =ipAddr.split(".")#将ip切割成列表
    if len(addr) != 4:#判断ip列表长度
        return False
    else:
        tag =True
        for i in range(len(addr)):
            try:
                addr[i]=int(addr[i])#ip必须是数字
                if addr[i]<=255 and addr[i]>=0:#判断ip范围
                    pass
                else:
                    tag =False
            except:
                tag =False
        return tag


print(check_ipv4_addr("192.168.133.4"))
print(check_ipv4_addr("101.0.256.112"))

import re
 
def check_ipv4_addr(ipAddr):
    p = re.compile(‘^((25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(25[0-5]|2[0-4]\d|[01]?\d\d?)$‘)
    if p.match(ipAddr):
        return True
    else:
        return False


print(check_ipv4_addr("191.168.35.257"))
print(check_ipv4_addr("11.0.0.112"))

password=input("请输入密码：")
def check_len(password):
    if len(password)>=8:
        return True
    else:
        return False


def check_num_letter(password):
    for i in password:
        if password.isdigit() and password.isalpha():
            return True
        else:
            return False

def check_punctuation(password):
    import string
    result =False
    for i in string.punctuation:
        if i in password:
            result =True
    return result

def check_strength(password):
    count =0
    if check_len(password):
        count +=1
    if check_num_letter(password):
        count +=1
    if check_punctuation(password):
        count +=1
            
    if count ==3:
        print("密码强")
    elif count ==2:
        print("密码中")
    else:
        print("密码弱")
check_strength(password)