Python 2.7.2+ (default, Oct 4 2011, 20:03:08)
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import copy
>>> glist = list(range(10))
>>> w = dict(var=10, lst=glist)
>>> x = w
>>> y = copy.copy(w)
>>> z = copy.deepcopy(w)
>>> w
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
>>> x
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
>>> y
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
>>> z
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
copy, deepcopy創建的新對象不隨源對象改變而改變
>>> w['var']=15
>>> w
{'var': 15, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
>>> x
{'var': 15, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
>>> y
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
>>> z
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
deepcopy創建對象內的引用也被復制，deepcopy的新引用不隨源引用改變
>>> glist[-1]='a'
>>> w
{'var': 15, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 'a']}
>>> x
{'var': 15, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 'a']}
>>> y
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 'a']}
>>> z
{'var': 10, 'lst': [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]}
>>>