How to use copy () and deepcopy () in Python
Xiaobian to share with you how to use copy() and deepcopy() in Python, I hope you have something to gain after reading this article, let's discuss it together!
1、copy.copy()
Example code:
import copyspam = ['A','B','C','D',[1,2,3,4]]cheese = copy.copy(spam)spam[0] = 42print(spam)
Run Results:
[42,'B','C','D',[1,2,3,4]]
From the results, we can see that when using the copy.copy() function, cheese copies the spam list reference, and when operating on the spam list, it will also affect the cheese list. This is also known as shallow copy.
2、deepcopy.copy()
Example code:
#Python learning exchange group: 778463939import copyspam =<$'A ',' B','C',' D',[1,2,3,4]cheese = copy.deepcopy(spam)#different parts spam[0] = 42print(spam)
Run Results:
[42,'B','C','D',[1,2,3,4]]
As you can see from the results, deepcopy() has no effect on the spam list, because deepcopy() produces a new reference, so spam and cheese
are two different references, so operating on spam lists does not affect cheese lists.
After reading this article, I believe you have a certain understanding of "how to use copy() and deepcopy() in Python". If you want to know more about it, please pay attention to the industry information channel. Thank you for reading!
