1 l = [1, 2, 3] 2 l.append(4) 3 print len(l) 4 print l[0] 5 print l[1] 6 print l[2] 7 print l[3] 8 print l[-1] 9 print l[-2] 10 print l[-3] 11 print l[-4] 12 print l
