How to add property to a class dynamically?

The goal is to create a mock class which behaves like a db resultset. So for example, if a database query returns, using a dict expression, {'ab':100, 'cd':200}, then I would like to see: >>> dummy.ab 100 At first I thought maybe I could do it this way: ks = ['ab', 'cd'] vs = [12, 34] class C(dict): def __init__(self, ks, vs): for i, k in enumerate(ks): self[k] = vs[i] setattr(self, k, property(la

[heavenshell]

"python: How to add property to a class dynamically?"

[mooz]

instance に対して property を setattr しても上手く動かない理由など．property は data descriptor だから．