Create a new class on the fly

[py_genetic]

Alex, thanks for the advise:

> > class PosRecords(tables.IsDescription):
>
> > class A(object):
> >     self.__init__(self, args):
>
> This makes 0 sense; maybe you should learn elementary Python syntax well
> _before_ trying advanced stuff, no?

I accidently left that erroneous snippet in, however if your offering
a class in smart ass let me know where to sign up.