Python - confused about inheritance

Question

I am writing test code with 3 classes and using the Chain of Responsibility configuration template, the code below

and I print print(c._abc is b._abc), the answer is True, but my original thinks they are different.

Then, Round 2, I will uncomment self._abc = kwargsand ask you to comment on the other 3 lines, the answer becomes false.

Why is this so?

import abc

class A:
    __metaclass__ = abc.ABCMeta

    _abc = {}

    def __init__(self,successor=None,**kwargs):
        self._successor = successor

    @abc.abstractmethod
    def handlerRequest(self):
        pass

class B(A):

    def __init__(self,successor=None,**kwargs):
        self._successor = successor
        print(kwargs)
        # self._abc = kwargs                 # round 2<---uncomment here
        self._abc['a'] = kwargs['a']         # round 2<---comment here
        self._abc['b'] = kwargs['b']         # round 2<---comment here
        self._abc['Hello'] = 'World'         # round 2<---comment here

    def handlerRequest(self):
        if (self._successor is not None):
            self._successor.handlerRequest()

        print(self._abc)

class C(A):

    def handlerRequest(self):
        if (self._successor is not None):
            self._successor.handlerRequest()
        print(self._abc)

list = {'a':1,'b':2}
b = B(**list)
c = C(b)
print(c._abc is b._abc)
c.handlerRequest()

Answer 1

, , , _abc - , , . _abc _abc. (, SO , DO)

, _abc , python id():

id() "" . ( ), . id().

, :

In [33]: id(c._abc)
Out[33]: 4454841440 

In [34]: id(b._abc)
Out[34]: 4454841440

In [36]: id(A._abc)
Out[36]: 4454841440

In [38]: id(B._abc)
Out[38]: 4454841440

In [39]: id(C._abc)
Out[39]: 4454841440

id(). , self._abc = kwargs, , id():

In [8]: id(b._abc)
Out[8]: 4585625712 # its different from A._abc and c._abc why?

In [9]: id(c._abc)
Out[9]: 4585627152 # same as A._abc

In [10]: id(A._abc)
Out[10]: 4585627152 # this is same as c._abc

b._abc , c._abc A._abc . , ?

:

# self._abc = kwargs                 
self._abc['a'] = kwargs['a']
self._abc['b'] = kwargs['b']
self._abc['Hello'] = 'World'

shared class _abc. self._abc, self._abc class, 2, :

self._abc = kwargs

kwargs, , , self._abc. self._abc B B.

, B, id :

In [11]: class B(A):
    ...:
    ...:     def __init__(self,successor=None,**kwargs):
    ...:         self._successor = successor
    ...:         print(id(self._abc))
    ...:         print(id(kwargs))
    ...:         self._abc = kwargs
    ...:         print(id(self._abc))

In [12]: b = B(**list)
4585627152 # original self._abc id
4583538904 # kwargs object id
4583538904 # New self._abc id

, self._abc 4585627152, kwargs 4583538904, self._abc= kwargs self._abc - 4583538904.