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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_class(self, module, class_name):
 """try and get the class_name from the module and make sure it is a valid controller"""

        # let's get the class
        class_object = getattr(module, class_name, None)
        if not class_object or not issubclass(class_object, Controller):
            class_object = None

        return class_object