Reuse part of a Regex pattern

Question

Consider this (very simplified) example string:

1aw2,5cx7

As you can see, it is two digit/letter/letter/digit values separated

Answer 1

I was troubled with the same problem and wrote this snippet

import nre
my_regex=nre.from_string('''
a=\d\w\w\d
b={{a}},{{a}}
c=?P{{a}}),(?P=id)
''')
my_regex["b"].match("1aw2,5cx7")

For lack of a more descriptive name, I named the partial regexes as a,b and c.

Accessing them is as easy as {{a}}