On Thu, 15 Mar 2007 04:33:01 +0000, Paulo da Silva wrote:
> I would like to implement something like this:
>
> class C1:
> def __init__(self,xxx):
> if ... :
> self.foo = foo
> self.bar = bar
> else:
> self=C1.load(xxx)
>
> def load(xxx):
> ...
> return instance_of_C1
> load=staticmethod(load)
>
> This does not seem correct. How can I do it?
Others have come up with other solutions which may or may not work, but
perhaps you can adapt this to do what you want.
class CachedClass(object):
"""Class that recycles cached instances.
"""
_cache = {}
def __new__(cls, ID):
print "Calling constructor __new__ ..."
if cls._cache.has_key(ID):
print "Returning cached instance..."
return cls._cache[ID]
else:
print "Creating new instance..."
obj = super(CachedClass, cls).__new__(cls, ID)
cls._cache[ID] = obj
return obj
def __init__(self, ID):
print "Calling constructor __init__ ..."
self.ID = ID
--
Steven
--
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