Python’s magic method
__delete__() is called to delete an instance’s attribute. For example, the expression
del my_obj.attr would result in
attr.__delete__(my_obj), so you’d give the attribute itself the responsibility for its deletion on
We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all dunder methods with explanation, check out our dunder cheat sheet article on this blog.
Syntax and Example
Let’s have a look at an example:
class My_Attribute: def __delete__(self, instance): print('hello world') class MyClass: attr = My_Attribute() my_obj = MyClass() del my_obj.attr # hello world
Where to Go From Here?
Enough theory. Let’s get some practice!
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While working as a researcher in distributed systems, Dr. Christian Mayer found his love for teaching computer science students.
To help students reach higher levels of Python success, he founded the programming education website Finxter.com. He’s author of the popular programming book Python One-Liners (NoStarch 2020), coauthor of the Coffee Break Python series of self-published books, computer science enthusiast, freelancer, and owner of one of the top 10 largest Python blogs worldwide.
His passions are writing, reading, and coding. But his greatest passion is to serve aspiring coders through Finxter and help them to boost their skills. You can join his free email academy here.