How to use the functions in the python copy module

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1. The copy.copy () function can be used to copy variable values such as lists or dictionaries. The copied list and the original list are two separate lists.

Import copyorigin = [1Jing 2 Jue 3] new = copy.copy (origin) new [0] = 0print ("origin =", origin) print ("new =", new)

2. If there is a list in the list you want to copy, use the deepcopy () function to copy it completely.

Import copyorigin = [[1Jing 2jin3], ['axiajukai]] new = copy.deepcopy (origin) # use deep copynew [0] [0] = 0print ("origin =", origin) print ("new =", new)

Knowledge points to add:

Introduction of copy module

Copy module

The copy module is used for copying objects. The copy module is very simple, with only two api. They are copy.copy (x) and copy.deepcopy (x). These two functions return shallow and deep copies of parameter x, respectively. This module provides only two main methods:

Copy.copy: shallow copy (Shallow copy)

Copy.deepcopy: deep copy (Deep copy)

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