Python拷贝分为深拷贝和浅拷贝
- 浅拷贝对子对象不拷贝，深拷贝全部拷贝
l1 = [1,2,[3,4]]
l2 = copy.copy(l1)
l1.append(5)
l1[2].append(5) # 子对象 改变
print(l1)
print(l2)
--------------
[1,4,5],5]
[1,5]]- 深拷贝完是两个完全不相干的对象
l1 = [1,4]]
l2 = copy.deepcopy(l1)
l1.append(5)
l1[2].append(5)
print(l1)
print(l2)
--------------
[1,4]]