Edit group content in python regular expression MatchObject

I have the following (simplified) code - this is the essence of what i would like to do

def replace_todo(m):
    m[2] = '*' if value else ' '
    return m.group()

I want to edit a specific group in the match object, and then render the whole match out including the edited part.

The replace_todo function gets called on every match by using

myCompiledRegex.sub(replace_todo, text)

The text that is used as input is

[ ] mah lalalalalaa
[*] mah lalalalalaa

expected output

[*] mah lalalalalaa
[*] mah lalalalalaa

The regex looks like this

^(\[( |\*)]) ([a-z][a-z][a-z]) (.*)$

But it seems i'm not allowed to edit the match object

When i try to execute the above code i get the following TypeErro开发者_如何学Gor

_sre.SRE_Match' object does not support item assignment

Thanks in advance :)

EDIT:

Using spicavigo solution, when converting the list to a string (str(groups)) this is how it looks

[u’[ ]’, '*’, u’jsp’, u’do something’]

this is how it should look

[*] jsp do something

---

I am novice when it comes to regex but couldn't you take m.groups() initially, change whatever you wish to and then return the variable?

Say:

x=list(m.groups()) #NOTE: groups and not group
x[2] = '*' if value else ' '
return x

EDIT

Maybe now I get what you are trying to achieve. As mentioned in the comment below, can you change your regex to

'^(\[)( |\*)(]) ([a-z][a-z][a-z]) (.*)$'

This is basically to help in joining of the list m.groups()