Python拷貝分為深拷貝和淺拷貝

• 淺拷貝對(duì)子對(duì)象不拷貝，深拷貝全部拷貝

l1 = [1, 2, [3, 4]]
l2 = copy.copy(l1)
l1.append(5)
l1[2].append(5)  # 子對(duì)象 改變
print(l1)
print(l2)
--------------
[1, 2, [3, 4, 5], 5]
[1, 2, [3, 4, 5]]

• 深拷貝完是兩個(gè)完全不相干的對(duì)象

l1 = [1, 2, [3, 4]]
l2 = copy.deepcopy(l1)
l1.append(5)
l1[2].append(5)
print(l1)
print(l2)
--------------
[1, 2, [3, 4, 5], 5]
[1, 2, [3, 4]]

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