Re: [Cython] Object not released when calling cpdef method from inherited class ?

[Robert Bradshaw]

On Jul 7, 2008, at 8:42 PM, Robert Bradshaw wrote:

On Jul 7, 2008, at 8:37 PM, Guillaume Chereau wrote:

Hello all,

I am currently using cython for a project related to openmoko cell

phone : http://charlie137-2.blogspot.com/2008/07/introducing- tichy.html

tracked down the problem to the case where I create a subclass of a
cython class and then redefine a cpdef method, asking it to call the
parent method, but ONLY if the cpdef method then call an other cpdef
method !

Here is the smallest example I could come with that fails :


== test.pyx ==

cdef class A:
    cpdef func(self):
        return

    cpdef test(self):
         self.func()


== main.py ==

import test
import gc

class B(test.A):
    def test(self):
        test.A.test(self)

b = B()

for i in range(10):
    b.test()
    gc.collect()
    print len(gc.get_objects())


The output will show that some objects are not released.

Is it a known bug ? Is there a way to avoid it ?

I noticed that the memory is constantly increasing when I use cython. I

This isn't a known bug, but does sound like something fishy is going on. Thanks for the report. The easiest fix I have for now is to make one or the other methods an ordinary def method (sacrificing speed for better memory handling), but I'll be looking into it.

See http://hg.cython.org/cython-devel/rev/f612fb161cd0

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