text manipulation

[Johhny]

Hello,

I am trying to write a script in python (to replace a perl script with
limited functionality). Now I have some issues. Currently I am using
the perl to load the file then regex parse certain lines to remove
characters (uncomment lines and change variables). I would like to take
that into the python script. I have had a look at the module "string"
and I dont think its what Im looking for.

Here is an example of some text I would like to manipulate

#comment here
#user_defined_variable = no
#

I would like to make that

#comment here
user_defined_variable = yes
#

With perl/sed Its very easy, However Im having issues to do it in
python. Any advice would be great.

Regards,

Johhny.