Is there something new in cython that makes __destruct__ a special method?
I thought __dealloc__ was the place to undo __cinit__ stuff.
On Monday, December 3, 2018 at 7:29:14 AM UTC-8, Dima Pasechnik wrote:
>
> An expert in Cython/Python classes needed: __destruct__ is not called for
> a reason I don't understand.
>
> There is class Graph with a method convexity_properties
>
> which calls cdef'd class ConvexityProperties in a separate pyx file.
> A destructor for the latter is defined as
> def __destruct__ but is never called. What is going on? What is the
> correct design here?
>
> Dima
>
>
> ---------- Forwarded message ---------
> From: sage-trac <tr...@sagemath.org <javascript:>>
> Date: Mon, 3 Dec 2018 15:02
> Subject: Re: [sage-trac] #26795: Some memory leaks
> To:
>
>
> #26795: Some memory leaks
> -------------------------------------+-------------------------------------
> Reporter: jmantysalo | Owner:
> Type: defect | Status: needs_work
> Priority: major | Milestone: sage-8.5
> Component: memleak | Resolution:
> Keywords: | Merged in:
> Authors: Dima Pasechnik | Reviewers:
> Report Upstream: N/A | Work issues:
> Branch: | Commit:
> public/packages/glpkbackendmemleak |
> c42c3bc27da534544dc62a953d5457d6c27532b5
> Dependencies: | Stopgaps:
> -------------------------------------+-------------------------------------
>
> Comment (by dimpase):
>
> Replying to [comment:21 jmantysalo]:
> > What's this:
> >
> > {{{
> > import gc
> >
> > i = 0
> > GG = graphs()
> > _ = next(GG); _ = next(GG);
> > for P in GG:
> > if i > 20000: break
> > if i % 1000 == 0:
> > _ = gc.collect()
> > print get_memory_usage(), P.order()
> > i += 1
> > _ = P.convexity_properties()
> > }}}
> >
> > ??? There is an explicit `__destruct__` in class `ConvexityProperties`.
>
> however, `__destruct__` is not called, as one can see by putting a
> `print()` there.
>
> --
> Ticket URL: <https://trac.sagemath.org/ticket/26795#comment:26>
> Sage <http://www.sagemath.org>
> Sage: Creating a Viable Open Source Alternative to Magma, Maple,
> Mathematica, and MATLAB
>
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