寫一個正則表達式判斷一個字符串是否是ip地址

規(guī)則：一個ip地址由4個數(shù)字組成，每個數(shù)字之間用.連接。每個數(shù)字的大小是0-255

255.189.10.37 正確

256.189.89.9 錯誤

import re
from re import *

def func():
    while True:
        ip1 = input('請輸入ip地址：')

        re_str = r'((([1-9][0-9])|[0-9]|([1][0-9][0-9])|([2][0-5][0-5]))\.){3}(([1-9][0-9])|[0-9]|([1][0-9][0-9])|([0-2][0-5][0-5]))'
        result = re.fullmatch(re_str,str(ip1))
        if result:
            print('正確')
            break
        else:
            print('不對')

func()

計算一個字符串中所有的數(shù)字的和

例如：字符串是：‘hello90abc 78sjh12.5’ 結(jié)果是90+78+12.5 = 180.5

def func():
    while True:
        ip1 = input('請輸入字符串：')
        num1 = 0
        print(findall(r'\d+\.?\d+', ip1))

        for str1 in findall(r'\d+\.?\d+', ip1):
            num1 += float(str1)
        print(num1)

func()

驗證輸入的內(nèi)容只能是漢字

def func():
    while True:
        ip1 = input('請輸入字符串：')
        re_str = r'[\u4e00-\u9fa5]+'
        result = re.fullmatch(re_str, ip1)
        if result:
            print('正確')
            break
        else:
            print('不對')

func()

電話號碼的驗證

def func():
    while True:
        ip1 = input('請輸入字符串：')
        re_str = r'1[0-9]{10}'
        result = re.fullmatch(re_str, ip1)
        if result:
            print('正確')
            break
        else:
            print('不對')

func()