论坛 › Python › python学习笔记七：浅拷贝深拷贝

haloi 发表于 2015-12-2 10:05:22

python学习笔记七：浅拷贝深拷贝

原理

　　

浅拷贝



import copy
b = copy.copy(a)
　　demo：



>>> a=]
>>> b=a
>>> c=copy.copy(a)
>>> a
]
>>> b
]
>>> c
]
>>> id(a)
140556196249680
>>> id(b)
140556196249680
>>> id(c)
140556298139120
>>> a=2
>>> a
]
>>> c
]
>>>a.append('b')
>>>a
]
>>>c
]
深拷贝



import copy
b = copy.deepcopy(a)
　　demo:



>>> a=]
>>> b=copy.deepcopy(a)
>>> a
]
>>> b
]
>>> id(a)
140556196175952
>>> id(b)
140556196501336
>>> id(a)
11961144
>>> id(b)
11961144
>>> id(a)
140556196424448
>>> id(b)
140556196250472
>>> a=3
>>> a.append('c')
>>> a
]
>>> b
]

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