Python-сообщество

class A(object):
    def __init_(self):
        pass
class B(object):
    def __init_(self):
        self.objectA = A()
    def func(self):
        print("HELLO WORLD!")
   

from authorization import AuthorizationWidget
class Client(object):
    def __init__(self):
        self.authWidget = AuthorizationWidget(self.authValidator)
        self.authWidget.show()
    def authValidator(self, nick):
        if len(nick) > 15:
            return "nick is too long"
        else:
  #обращение к серверу и бла бла... и если ник верный, то 
            return True
            self.authWidget.close()
client = Client()