#!/bin/env python

class Vector(object):
  # constructor
  def __init__(self, coord):
    self.coord = coord  

  # turns the object into string  
  def __str__(self):
    return str(self.coord)
  
  def __getitem__(self, index):
    '''Return the coordinate with number index.'''
    return self.coord[index]

  def __getslice__(self, left, right):
    '''Return a subvector.'''
    return Vector(self.coord[left:right])

if __name__ == "__main__":
    v1 = Vector(range(5))
    print("Vector: ", str(v1));
    print("Element at index 2: ", v1[2])
    print("Slice up to index 2:", str(v1[0:2]))