I’m trying to match a string that has a pattern similar to a function declaration.

    line='fun x(a,b,c,d)'
    m=re.match(r'fun (w+)((w+)(,w+)*)',line)
    print(m.groups())

Surprisingly it prints the output as (‘x’, ‘a’, ‘,d’) instead of the expected (‘x’, ‘a’, ‘b’, ‘c’, ‘d’)

I know I can use other methods to solve this specific problem (find_all, split, etc.) but I want to figure out what I don’t understand about match behavior