python:re.match和re.search的区别
作者:互联网
re.match函数只匹配字符串的开始字符,如果开始的字符不符合正则表达式,匹配就会失败,返回None。
re.search方法匹配整个字符串,直到找到一个匹配的对象,匹配结束没找到匹配值才返回None。
def test_B():
# ! /usr/bin/evn python
# -*- coding:utf-8 -*-
import re
line = 'Cats are smarter than dogs dogs'
matchObj = re.match(r'dogs', line)
if matchObj:
print('use match,the match string is:', matchObj.group())
else:
print('No match string!!')
matchObj = re.search(r'dogs', line)
if matchObj:
print('use search,the match string is:', matchObj.group())
else:
print('No search match string!!')
执行结果如下:
No match string!!
use search,the match string is: dogs
标签:search,string,python,matchObj,re,dogs,match 来源: https://www.cnblogs.com/lhTest/p/15529368.html