Hi I do have a module which at least until next year has to be awave of some users who still use pyhton 2 eventhough not so far from now at end of life. For this i have a central module which deals with all the differences and ensures that base classes and basic classes exported by the module are independent of pyhton verison. All pyhton version specific stuff is handled by a single if sys.verision_info[0] >= 3: else: clause. The question i do have is how do i tell pylint or astroid respective that eiter the if or the else branche is relevant and that i can ignore the other. The cause of this question is that the module also contains a class which has dynamic attricutes, as it represents the DOM of binary data files. For smoe specific requirements this class in addition has a custom metaclass sepcified. As metaclass specification differs in Pyhton 2 and Pyhton 3 i have defined an empty parent class as follows if sys.version_info[0] >= 3: class ParentClass(object,metaclass=NodeMetaClass): pass else: class ParentClass(object): __metaclass__ = NodeMetaClass pass class Node(ParentClass): pass pylint will not report any no-member error on the Node class cause it thinks that the PraentClass object is ambigously defined. The method safe_infer retruns None. Is it possible via transform plugin module to make pylint or astroid ignore one of the two definitions or at least hide them from safe_infer method. So that no-member check is performed properly. Currently i have enabled all checks.