拷贝

拷贝/浅拷贝/深拷贝都是针对可变类型数据而言的

list1 = ["a","b","c","d","f",["e","f","g"]]list2 = list1list1[2] = "plf"list1[5][0] = "lt"print(list1)print(list2)'''['a', 'b', 'plf', 'd', 'f', ['lt', 'f', 'g']]['a', 'b', 'plf', 'd', 'f', ['lt', 'f', 'g']]''''''    总结:  如果list2是 list1的拷贝,那么list1和list2公用一块内存空间,因此list1改变,list2也会随着改变!        '''

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浅拷贝

import copylist1 = ["a","b","c","d","f",["e","f","g"]]list2 = copy.copy(list1)list1[2] = "plf"list1[5][0] = "lt"list1[5].append("xyz")print(list1)print(list2)'''['a', 'b', 'plf', 'd', 'f', ['lt', 'f', 'g', 'xyz']]['a', 'b', 'c', 'd', 'f', ['lt', 'f', 'g', 'xyz']]''''''    总结:         1.  如果 list2 是 list1 的浅拷贝对象,则1内的不可变元素发生了改变,list2 不变;          2.  如果 list1 内的可变元素发生了改变,则 list2 会跟着改变.'''

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深拷贝

import copylist1 = ["a","b","c","d","f",["e","f","g"]]list2 = copy.deepcopy(list1)list1[2] = "plf"list1[5][0] = "lt"list1[5].append("xyz")print(list1)print(list2)'''['a', 'b', 'plf', 'd', 'f', ['lt', 'f', 'g', 'xyz']]['a', 'b', 'c', 'd', 'f', ['e', 'f', 'g']]''''''    总结:        如果list2 是 list1 的深拷贝,那么list1 和list2 都是独立的个体,不存在任何关系'''