Python 标准库的 copy 模块提供了对象拷贝的功能。 copy 模块中有两个函数 copy 和 deepcopy,分别支持浅拷贝与深拷贝。
copy_demo.py
import copy class MyClass(object):
def __init__(self, name):
super(MyClass, self).__init__()
self.name = name a = [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? True
print 'a is c?', a is c # a is c? False
print 'a == c?', a == c # a == c? False a[0].name = 'sugar'
print 'a[0].name =', a[0].name # a[0].name = sugar
print 'b[0].name =', b[0].name # b[0].name = sugar
print 'c[0].name =', c[0].name # c[0].name = huey