regex - Regular expression listing all possibilities

Question

Given a regular expression, how can I list all possible matches? For example: AB[CD]1234, I want it to return a list like: ABC1234 ABD1234

I searched the web, but couldn't find anything.

Answer 1

Exrex can do this:

$ python exrex.py 'AB[CD]1234'
ABC1234
ABD1234