Dynamic Inheritance Factory Class

dynamicFactoryClass.py

class Database(object):
    def _print(self):
        print('Database class')

class Local(object):
    def _print(self):
        print('Local class')

class BaseThing(object):
    def __init__(self):
        self.is_base = True
    
    def _print(self):
        raise NotImplementedError
        

class ThingFactory(object):
    """
    create Thing() objects which inherit from either 'Local' or 'Database'
    classes depending on the arguments provided
    """
    @staticmethod
    def make_thing(_type):
        hack = BaseThing() # how to fix this ?
        return type('BaseThing', (eval(_type), ), hack.__dict__)

# define a dynamically inherited Sample() class that also inherits from Local()
Thing = ThingFactory.make_thing('Database')

# create instance of this class
loc_thing_instance = Thing()

# check that instance is correct!
loc_thing_instance._print() # prints correctly
print(loc_thing_instance.is_base) # is_base = True!