Python (3)-depth copy

Import Copy

Copy.copy () Shallow copy

Copy.deepcopy () deep copy

Import copy>>> a1 = 123>>> a2 = A1>>> a3 = copy.copy (A1)>>> A4 =< c4> copy.deepcopy (A1)Print(ID (A1), ID (A2), ID (A3), id (A4))1967314832 1967314832 1967314832 1967314832

Look at one more example.

" K1 ":"wu","K2""K3": ["ABC", 456]} >>> n2 = N1>>> n3 = copy.copy (n1)>>> N4 = copy.deepcopy (n1)

Depth copy

A shallow copy copies only one layer, and the depth copies how many layers are copied.

If it is a read-only object, it can be generated quickly with a shallow copy.

But if you need to make different changes, you need to use a deep copy.

Python (3)-depth copy