例9.5 使用序列

源文件：code/reference.py

#!/usr/bin/python# Filename: reference.pyprint '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', shoplistprint 'mylist is', mylist# notice that both shoplist and mylist both print the same list without# the 'apple' confirming that they point to the same objectprint 'Copy by making a full slice'mylist = shoplist[:] # make a copy by doing a full slicedel mylist[0] # remove first itemprint 'shoplist is', shoplistprint 'mylist is', mylist# notice that now the two lists are different

输出

$ python reference.pySimple Assignmentshoplist is ['mango', 'carrot', 'banana']mylist is ['mango', 'carrot', 'banana']Copy by making a full sliceshoplist is ['mango', 'carrot', 'banana']mylist is ['carrot', 'banana']