Take a keen look at the above regexp, There must be two regex, One for normal grep and other for python re. Eg.
```
 RESPONSE_REGEXP_FOR_SSI: Server Side Includes_____<!--#_____(<!--(?:#.*)?-->)
```
In the above line, **<!--#** is used for grep search and then **(<!--(?:#.*)?-->)** is used in python re. You must specify both or else, the search wont work