[Python-Dev] Garbage collecting closures
11 Apr 2003 23:38:14 -0400
On Fri, 2003-04-11 at 19:59, Paul Prescod wrote:
> Does this bug look familiar to anyone?
No bug here.
> import gc
> def bar(a):
> def foo():
> return None
> x = a
> class C:pass
> a = C()
> for i in range(20):
> print len(gc.get_referrers(a))
> x = bar(a)
> On my Python, it just counts up. "a" gets more and more referrers and
> they are "cell" objects. If it is unknown, I'll submit a bug report
> unless someone fixes it before I get to it. ;)
Nested recursive functions create circular references, which are only
collected when the garbage collector runs. Add a gc.collect() call to
the end of your loop and the number of referrers stays at 1.