Python - 搜索和匹配

使用正则表达式有两个看似相似但具有显着差异的基本操作。re.match ()仅在字符串的开头检查匹配，而re.search()检查字符串中任何位置的匹配。这在文本处理中起着重要作用，例如，我们通常必须编写正确的正则表达式来检索文本块以进行情感分析。

import re

if  re.search("tor", "Tutorial"):
        print "1. search result found anywhere in the string"
        
if re.match("Tut", "Tutorial"):
         print "2. Match with beginning of string" 
         
if not re.match("tor", "Tutorial"):
        print "3. No match with match if not beginning" 


        
# Search as Match
        
if  not re.search("^tor", "Tutorial"):
        print "4. search as match"

当我们运行上面的程序时，我们得到以下输出 -

1. search result found anywhere in the string
2. Match with beginning of string
3. No match with match if not beginning
4. search as match