Class Objects...

[zowhair]

But x.f is not the same thing as MyClass.f — it is a method object, not a function object.
What is the difference between method and function here, as I learned that method and functions are same things.

[Gribouillis]

It is very simple, MyClass.f is the function object that was defined in MyClass, while x.f is an entity named 'bound method' which essentialy means a pair containing an instance and a function glued together.

[wavic]

class MyClass:
    def f():
        pass

The function f() is defined inside the class MyClass and that is the reason to call it method.
Calling the method:

MyClass.f()

Creating an instance of the class:

x = MyClass()

Now, you create an instance of MyClass called x. Then call the method:

x.f()