> One solution is to use descriptor protocol on the class, which means > using a metaclass. I'm not sure it's the best option, but it is an > option.
I will look at that, I wonder if however I am not over complicating it:
class Foo:
_bar = None
@property
def expensive(self):
if Foo._bar is None:
import something
Foo._bar = something.expensive()
return Foo._bar
Somewhat naive, but a test with if is pretty cheap...
Thanks Chris,
jlc
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