How to use the _ _ del__ method in python

This article mainly introduces "how to use the _ _ del__ method in python". In the daily operation, I believe that many people have doubts about how to use the _ _ del__ method in python. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "how to use the _ _ del__ method in python". Next, please follow the editor to study!

1. The _ _ del__ method is called a destructor and is used to implement the operations required for the object to be destroyed. Ex: release resources occupied by objects, open file resources, network connections, and so on.

Python implements automatic garbage collection, and the garbage collector calls the _ _ del__ method when the object is not referenced (reference count is 0).

2. Delete the object with the del statement to ensure that the _ _ del__ method provided automatically by the system is called. Generally, there is no need for a custom destructor.

Example

Class Person: def _ del__ (self): print ("destroy object: {0}" .format (self)) p1 = Person () # 5. Destroy object: print (id (p1)) # 1. 2060731260872p2 = Person () # 3. Destroy object: print (id (p2)) # 2. 2060731302024del p2print ("over") # 4. Over# print (id (p2)) # name 'p2' is not defined, the study on "how to use the _ _ del__ method in python" is over. I hope I can solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!