import copy a = [11, 22] b = a print(id(a)) # 17812744 print(id(b)) # 17812744 c = copy.deepcopy(a) print(id(a)) # 17812744 print(id(c)) # 17810952 print(a) # [11, 22] print(c) # [11, 22] a.append(33) print(a) # [11, 22, 33] print(c) # [11, 22]
可以看到a、b内存地址是一样，可如下图表示；而c是完完全全拷贝了一份a指向的内容，这就是深拷贝。
import copy a = [11, 22] b = [33, 44] c = [a, b] d = copy.copy(c) print(id(c)) # 17811464 print(id(d)) # 17405960 a.append(55) print(c) # [[11, 22, 55], [33, 44]] print(d) # [[11, 22, 55], [33, 44]]
把c里的东西取出来，然后d指向它，大致如下图所示。
import copy a = [11, 22] b = [33, 44] c = [a, b] d = copy.deepcopy(c) print(id(c)) # 17942536 print(id(d)) # 17943112 a.append(55) print(c) # [[11, 22, 55], [33, 44]] print(d) # [[11, 22], [33, 44]]
深拷贝：我已经完完全全拷贝过来了，你改你的东西，不关我事。
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原文：https://www.cnblogs.com/believepd/p/10410019.html