How to add property to a class dynamically?

Question

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\'

Answer 1

It seems you could solve this problem much more simply with a namedtuple, since you know the entire list of fields ahead of time.

from collections import namedtuple

Foo = namedtuple('Foo', ['bar', 'quux'])

foo = Foo(bar=13, quux=74)
print foo.bar, foo.quux

foo2 = Foo()  # error

If you absolutely need to write your own setter, you'll have to do the metaprogramming at the class level; property() doesn't work on instances.