reference.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
""" 
**Project Name:**      
**Product Home Page:** 
**Code Home Page:**    
**Authors:**           
**Copyright(c):**      Pengfei Cui 
**Licensing:**         GPL3 
**Coding Standards:**  
Description
--------

"""

#!/usr/bin/python
# Filename: reference.py

print 'Simple Assignment'
shoplist = ['apple', 'mango', 'carrot', 'banana']
mylist = shoplist # mylist is just another name pointing to the same object!

del shoplist[0]

print 'shoplist is', shoplist
print 'mylist is', mylist
# notice that both shoplist and mylist both print the same list without
# the 'apple' confirming that they point to the same object
del mylist[0]

print 'Delete in mylist'
print 'shoplist is', shoplist
print 'mylist is', mylist

print 'Copy by making a full slice'
mylist = shoplist[:] # make a copy by doing a full slice
del mylist[0] # remove first item

print 'shoplist is', shoplist
print 'mylist is', mylist
# notice that now the two lists are different