Philipp von Weitershausen wrote:
...hence the quotes. It's a "function" in that I want to use it as an
adapter that doesn't need to be instantiated by a factory before being
used.
All adapters need to be instantiated.
Why?
def myStrAdapter(something):
return str(something)
This function adapts strings to integers, why would it need to be
instantiated?
No. You always register a factory which is called upon lookup. That's
because adapters are context-dependent and thus need to be instantiated
every time you look them up.
What if they're not context-dependent as in my example above?
ultimately, I'm looking to replace code like the following:
convertors = {
int:{str:str,datetime:datetime},
str:(int:int,datetime:datetime},
}
def convert(x,y):
return convertors[type(x)][type(y)](x)
...if you see what I mean. Apologies for the trivial examples, but these
are real problems...
cheers,
Chris
--
Simplistix - Content Management, Zope & Python Consulting
- http://www.simplistix.co.uk
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