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import sys
def _next(it):
if sys.version_info[0] >= 3:
return next(it)
else:
return it.next()
def test_reference_cycle_cleanup():
"""
>>> import gc
>>> delegator, gen, deleted = test_reference_cycle_cleanup()
>>> _next(delegator(gen()))
123
>>> _ = gc.collect(); print(sorted(deleted))
['bar', 'foo']
"""
deleted = []
class Destructed(object):
def __init__(self, name):
self.name = name
def __del__(self):
deleted.append(self.name)
def delegator(c):
d = Destructed('foo')
yield from c
def gen():
d = Destructed('bar')
while True:
yield 123
return delegator, gen, deleted
|
