> import Templates
>
> self.site_name = 'SiteA'
> self.template_type = 'Page'
>
> self.template = ???
How about a dictionary holding references to the classes against their
names?
The dictionary could be a class attribute of the top level superclass or a
module
level dictionary. It should be updated ideally by the class definition or
more
simply by hard coding a registration fuinction.
Something like
class Root:
subclasses = {'Root': Root}
@classmethod
def registerSubclass(name, aClass):
#could check it really is a subclass here...
Root.subclasses[name] = aClass
class Sub(Root):
pass
Root.registerSubclass("Sub",Sub)
Now your code becomes:
self.site_name = 'SiteA'
self.template_type = 'Page'
self.template = Root.subclasses[self.template_name]() # instance of Page
In fact it could just be a dictionary of templates, it needn't be subclasses
at all, however for the sake of clean polymorphism its probably better
if they are.
HTH
Alan G.
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