0429---每日习题 菲薄纳西数列 正则ip匹配

#8、打印斐波拉契数列前n项

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))

C:\Users\dell>py -3 C:\Users\dell\Desktop\练习\4\20190428.py
1
1
2
3
5
8
13
21

#9、检查ipV4的有效性，有效则返回True，否则返回False，（提示使用split函数进行分割）

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"))

#正则匹配

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"))

#10、检测密码强度
'''
c1 : 长度>=8
c2: 包含数字和字母
c3: 其他可见的特殊字符
强：满足c1,c2,c3
中: 只满足任一2个条件
弱：只满足任一1个或0个条件
'''

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)