Nick Coghlan <[email protected]> added the comment:
If I recall correctly, it's the generator destructor that handles throwing in
``GeneratorExit`` to get the generator to terminate. So this code can resurrect
a generator as it's being collected by the GC:
def resurrecting(resurrected):
self = yield
try:
yield
finally:
resurrected.append(self)
storage = []
g = resurrecting(storage)
g.send(g) # Give the generator a reference to itself
del g # Now the generator is in a cycle with itself
gc.collect()
gc.collect()
gc.collect()
# Generator has been added to the storage instead of collected
assert len(storage) == 1
# Clear the storage to kill it for real this time
storage.clear()
# Weakrefs shouldn't get called until here
Antoine, does that sound right to you?
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<https://bugs.python.org/issue14934>
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