I'm using sqlalchemy's ORM and I have a bunch of `Declarative` classes that with class attributes. For instance:

```
class Example(Declarative):
    id = Column(Integer, primary_key=True)
    datum = Column(String(65))

```

Naturally, my classes are much longer than this example and I have about two dozen. I'd like to be able to populate their fields at instantiation time, so it would be nice to have `__init__` functions for each class.

The naive way to do this is as follows:

```
    def __init__(self, id, datum):
        self.id = id
        self.datum = datumi

```

This gets very tedious. Is there some sort of shortcut? Perhaps I can exploit `Example.__dict__`? These are new-style classes.