python之正则表达式集中搜索区别

正则表达式中的search && findall && finditer 区别：

 

import sys;
import re;
if __name__ == '__main__':
    strVal = '''<a href="http://www.andylin02.com" target="_blank" class="dsdfv">aaaa</a>
<a href="http://www.congfeng.com" target="_blank" class="tdsfv">bbbbsdf</a>
<a href="http://www.st.com" target="_blank" class="txx">ccccccc</a>
<a href="http://www.qs.com" target="_blank" class="xxx">ddddd</a>    
    ''';
       
    print(strVal);
    
    strPattern = r"(<\s*a\s.*href\s*=.*)"; 
    
    #search    
    mtReSearch = re.search(strPattern, strVal);
    
    print("======================= search result =======================");
    print("%s ==> %d" %(mtReSearch.groups(), len(mtReSearch.groups()) ));
    
    #findall
    lsFind = re.findall(strPattern, strVal);
    print("\n===================== findall result ========================");
    print("%s ==> %d" %(lsFind, len(lsFind)));
    
    #finditer
    print("\n===================== finditer result =======================")
    for mtFind in re.finditer(strPattern, strVal):
        print(mtFind.groups());
        print("------");

 

结果：

<a href="http://www.andylin02.com" target="_blank" class="dsdfv">aaaa</a>
<a href="http://www.congfeng.com" target="_blank" class="tdsfv">bbbbsdf</a>
<a href="http://www.st.com" target="_blank" class="txx">ccccccc</a>
<a href="http://www.qs.com" target="_blank" class="xxx">ddddd</a>   
   
======================= search result =======================
('<a href="http://www.andylin02.com" target="_blank" class="dsdfv">aaaa</a>',) ==> 1

===================== findall result ========================
['<a href="http://www.andylin02.com" target="_blank" class="dsdfv">aaaa</a>', '<a href="http://www.congfeng.com" target="_blank" class="tdsfv">bbbbsdf</a>', '<a href="http://www.st.com" target="_blank" class="txx">ccccccc</a>', '<a href="http://www.qs.com" target="_blank" class="xxx">ddddd</a>    '] ==> 4

===================== finditer result =======================
('<a href="http://www.andylin02.com" target="_blank" class="dsdfv">aaaa</a>',)
------
('<a href="http://www.congfeng.com" target="_blank" class="tdsfv">bbbbsdf</a>',)
------
('<a href="http://www.st.com" target="_blank" class="txx">ccccccc</a>',)
------
('<a href="http://www.qs.com" target="_blank" class="xxx">ddddd</a>    ',)
------