Python problem:

I am confused about the [:] mean , it seems that just means "copy"?. So what the difference of these two question?

The next 2 questions refer to the following definition def g(p) z p.pop(0) p.extend(z) return p Question 10. What is the value of y after the following is evaluated? g(yl:]).extend(g(y)) (e) Error Question 11. What is the value of y after the following is evaluated? g(y).extend(g(yl:]) (c) ['i','j','h,, ,j','h',' (e) Error