Thursday, April 16, 2015

Who weakrefs the weakrefs?

>>> import weakref
>>> class Target(object): pass
...
>>> t = Target()
>>> r = weakref.ref(t)
>>> r2 = weakref.ref(r)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: cannot create weak reference to 'weakref' object

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