Why does the string not match the regular expression?

Question

Python

Pattern: ^.*\[[^\d,]*\].*$
String: anything[2287172,1932347]anything
You need to leave only the contents of the [] brackets, but the string does not change according to this pattern. Why?

Answer 1

Because it needs to be:

import re

string = 'anything[2287172,1932347]anything'
pattern = re.compile('^.+\[([\d,]+)\].+$')
string = pattern.match(string).group(1)
print string

Answer 2

^.+\[([\d,]+)\].+$
If you need to split the numbers, then through split