On Fri, 03 Aug 2012 13:48:08 -0700, Tobiah wrote:
> I have a bunch of classes from another library (the html helpers
> from web2py). There are certain methods that I'd like to add to
> every one of them. So I'd like to put those methods in a class,
> and pass the parent at the time of instantiation. Web2py has
> a FORM class for instance. I'd like to go:
>
> my_element = html_factory(FORM)
>
> Then my_element would be an instance of my class, and also
> a child of FORM.
You can use type() to create classes dynamically. E.g.:
class my_base_class(object):
# extra methods
subclasses = {}
def html_factory(cls, *args, **kwargs):
name = "my_" + cls.__name__
if name not in subclasses:
subclasses[name] = type(name, (cls, my_base_class), {})
return subclasses[name](*args, **kwargs)
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