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)