Transform "4CA2CACA" to "CCCCACCACA"

I have already tried this (as sombody told me on another question):

 import re
 def decode(txt):
     list = []
     for cnt, char in re.findall(r"([\d*])([^d])", txt):
         list.extend((char * (int(cnt) if cnt else 1)))
     list = "".join(list)
     return list

Example:

print(decode("2CACA2CACA3CACACA3CAC"))

This is what I get

CCCCCCCCCC

And this is what I need

CCACACCACACCCACACACCCAC

>Solution :

What you are missing is characters without a digit in front. This will include those:

import re

def decode(txt):
    _list = []
    for cnt, char, single_char in re.findall(r"(\d)([^\d])|([^\d])", txt):
        if single_char:
            _list.extend(single_char)
        else:
            _list.extend((char * (int(cnt) if cnt else 1)))
    _list = "".join(_list)
    return _list

print(decode("2CACA2CACA3CACACA3CAC"))