Python re operation, pythonre

Python re operation, pythonre

1. re. search (): search returns the search result object. You can use the group () or groups () method to obtain the matched string.

① Group () returns the matching string by default (ignore the parentheses in pattern). You can also specify the nth string in the brackets that return the matching success (count from 1 );

② Groups () returns the content in brackets of matched pattern in the form of tuples. If there are no parentheses in pattern, null tuples are returned.