[Python-Dev] @deprecated (was: Useful thread project for 2.5?) (original) (raw)
Nick Coghlan ncoghlan at iinet.net.au
Thu Mar 10 12:28:22 CET 2005
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Raymond Hettinger wrote:
Decorators like this should preserve information about the underlying function:
def deprecated(func): """This is a decorator which can be used to mark functions as deprecated. It will result in a warning being emmitted when the function is used.""" def newFunc(*args, **kwargs): warnings.warn("Call to deprecated function.") return func(*args, **kwargs) newFunc.name = func.name newFunc.doc = func.doc newFunc.dict.update(func.dict) return newFunc
A utility method on function objects could simplify this: newFunc.update_info(func)
The main benefit I see is that an 'update_info' method is more future-proof. If some other attributes are added to function objects that should be preserved, update_info() can be updated in parallel to transfer them, and any code using the method continues to be correct.
Regards, Nick.
-- Nick Coghlan | ncoghlan at email.com | Brisbane, Australia
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