#!/usr/bin/env python

class bla (list):
   def __init__ (self, sequenz):
      list.__init__ (self, sequenz)

   def __getitem__ (self, index):
      return list.__getitem__(self, index) + 3

if __name__=='__main__':
   f = bla ([1,2,3,4,5])

   for b in f:
      print b