#!/usr/bin/pythonimport reline = "Cats are smarter than dogs"matchObj = re.match( r'(.*) are (.*?) .*', line, re.M|re.I)if matchObj:print "matchObj.group() : ", matchObj.group()print "matchObj.group(1) : ", matchObj.group(1)print "matchObj.group(2) : ", matchObj.group(2)else:print "No match!!"以上實例執行結果如下：matchObj.group() : Cats are smarter than dogsmatchObj.group(1) : CatsmatchObj.group(2) : smarter請問， r'(.*) are (.*?) .*',這個是匹配什么東西，是如何匹配的？好像很復雜的樣子，另外matchObj.group(1)可以有輸出，填3的時候就出錯了？