Python(2.7.6) copy 淺拷貝與深拷貝

標籤：

Python 標準庫的 copy 模組提供了對象拷貝的功能。 copy 模組中有兩個函數 copy 和 deepcopy，分別支援淺拷貝與深拷貝。

copy_demo.py

import copyclass MyClass(object):    def __init__(self, name):        super(MyClass, self).__init__()        self.name = namea = [MyClass(‘huey‘)]b = copy.copy(a)c = copy.deepcopy(a)print ‘a is b?‘, a is b                # a is b? False        print ‘a == b?‘, a == b                # a == b? Trueprint ‘a is c?‘, a is c                # a is c? Falseprint ‘a == c?‘, a == c                # a == c? Falsea[0].name = ‘sugar‘print ‘a[0].name =‘, a[0].name        # a[0].name = sugarprint ‘b[0].name =‘, b[0].name        # b[0].name = sugarprint ‘c[0].name =‘, c[0].name        # c[0].name = huey

 

Python(2.7.6) copy 淺拷貝與深拷貝