Regex replace (in Python) - a simpler way? -

Any time I want to change a piece of text that is a large part of the text, I have to do something like always :

  "(? P & lt; start & gt; some_pattan) (? P & lt; substitution & gt; foo) (? P & lt; end & gt; termination) By adding the  start  group with new data for the group / code> 

and change and then the end group.

Is there a better way for this?

View in Python for (? =?) and (? & Lt; = ...) - I'm pretty sure that they are what you want, they match the strings, but do not "consume" those bits of stars that they match We do.