I'm doing some tests with decorators on class methods. Following is a code sample:

def my_decorator(prefix):
    def my_command(prefix):
        print(f'my_command is called with {prefix}')
        return lambda func: print(prefix)
    return my_command

class MyClass():

    def __init__(self):
        print('MyClass ctr')

    @my_decorator('cmd 1')
    def _method_1():
        pass

    @my_decorator('cmd 2')
    def _method_2():
        pass

print("=================")
m = MyClass()

When I execute the code I got the following output:

my_command is called with <function MyClass._method_1 at 0x7f99a1f1f040>
my_command is called with <function MyClass._method_2 at 0x7f99a1f1f160>
=================
MyClass ctr

It seems that the decorators of all the methods are called before calling the class ctr (__init__ method).

Is this the default behavior? Why are decorators being called during the class creation process?