Βρήκα αυτο το παράδειγμα αλλα δεν καταλαβα τι ακριβως γινεται. Πιο είναι το dangling reference εδω? Από
Weak reference doc
import weakref
class Object:
pass
o = Object() #new instance
print ("o id is:",id(o))
r = weakref.ref(o)
print ("r id is:",id(r))
o2 = r()
print ("o2 id is:",id(o2))
print ("r() id is:",id(r()))
print (o is o2)
del o,o2
print (r(),r) #If the referent no longer exists, calling the reference object returns None
o = r() # r is a weak reference object
if o is None:
# referent has been garbage collected
print ("Object has been deallocated; can't frobnicate.")
else:
print ("Object is still live!")
o.do_something_useful()
