Transform "4CA2CACA" to "CCCCACCACA"

Question

I have already tried this (as somebody 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

Answer 1

If you want to do it without any imports, then you could do something like this:

x = '2CACA2CACA3CACACA3CAC0M'
int_string = ""
char_list = []
for char in x:
    if char.isnumeric():
        int_string += char
        continue
    else:
        if not int_string:
            char_list.append(char)
        else:
            char_list.append(char * int(int_string))
        int_string = ""
print("".join(char_list))

This will work for any positive integers, even zero, as you can see in the above example.