Need print out lines before and after the match

[tester_V]

I do not know what that means "Why don't you just join lines[index-4] to lines[index+4]?"
Line ("".join(lines[max(0,index-4):index])) works fine.
It is 4 lines after a "match' Im having problem with.

I tried adding one more print statement but it does not print anything

            print("".join(lines[max(0,index-4):index]))  # print 4 lines preceeding it
            print("".join(lines[max(0,index+4):index]))  # print 4 lines after it

thank you.