Perhaps use the id of an object instead of its value. Here's how it might
work
>>> store = {}
>>> def wibble(fn):
... val = fn()
... name = fn.__name__
... store[id(val)] = name
... return val
>>> @wibble
... def ddd():
... return tuple(range(4))
>>> ddd
(0, 1, 2, 3)
>>> store[id(ddd)]
'ddd'
>>>
>>> x = ddd
>>> ddd = None
>>> store[id(x)]
'ddd'
I hope this helps.
--
Jonathan
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