Create a blank class instance without class definition

Question

Sometimes I use classes without any structure, ie

class Foo(object):
    pass

foo = Foo()

I wonder if there is a more compact way which avoids the clumsy, meaningless definition. Can one directly initialize blank object-instances?

Answer 1

Use type() :

>>> foo = type('Foo', (), {})()
>>> foo
<__main__.Foo object at 0x100499f50>

Answer 2

foo = object()

是常见的方式。