python error message: TypeError: missing 1 required positional argument: 'self'

Question

I'm trying to use a class, but I have this error:

TypeError: search() missing 1 required positional argument: 'self'

This is my code:

class School:
    def search(self):
        ... # do some stuff

harva = School()    
School.search()

Answer 1

Your final line is incorrect: you must (il faut que vous) invoke an instance method by calling it with an instance, not with the class:

harva.search()

When you call the method as a class method, it needs the instance:

School.search(harva)

However, you should use the first version.

---

In the future, don't write so much code at once. You should try to invoke the method before you have written all of that.

Answer 2

I think you mean harva.search() instead of School.search() . You defined search as an instance method. You must call it on an instance of school, and not on School class itself.

Answer 3

In object-oriented programming...the basic fundamental element is an object and a class along with its member variables & member functions can only be accessed through an instance of that class ie again object .

class School():
   def search(self):
   ...#some code

harva = School()
harva.search()

You can access a function inside a class without creating an instance of that class. Such functions are called as static functions.