python抽象クラスのいくつかの書き方

import abc
import six

@six.add_metaclass(abc.ABCMeta)
class A(object):

    @abc.abstractmethod
    def func(self):
        pass

class B(A):
    def cc(self):
        print("cc11111")
    def func(self):
        print("       ")

class G(object):
    __metaclass__ = abc.ABCMeta

    @abc.abstractmethod
    def func(self):
        pass

class H(G):
    def hhh(self):
        print("hh")

    def func(self):
        print("       ")

class D(metaclass=abc.ABCMeta):    #   python2       

    @abc.abstractmethod
    def func(self):
        pass


class E(D):
    def ff(self):
        print("ff")
    def func(self):
        print("       ")

class Q():

    @staticmethod
    def test111():
        print("    ")
    
    def test222(self):
        print("    ")

#       
q = Q()
q.test222()

#       
Q.test111()