Jason Biggs
On Fri, Aug 28, 2020 at 8:16 PM dmaziuk via Rdkit-discuss < rdkit-discuss@lists.sourceforge.net> wrote: > On 8/27/2020 8:48 PM, Jason Biggs wrote: > > > > I'm not very familiar with how the python interface works, is there a > > similar issue with the python wrappers? Does the wrapper class for the > > Atom clean up after itself differently if the atom is marked as having an > > owner? > > There Be Dragons. > > Python VM does reference counting on its own objects and will destroy > them for you at some point. Exactly how it works out with objects > created by external libraries is an interesting question. > > SWIG, for example, creates a "proxy" python object for each c++ one, > with a flag that tells the runtime to either destroy the underlying c++ > object when the "proxy" is garbage-collected, or not. E.g. if you > garbage-collect an Atom on python side, you have no idea if destroying > its linked c++ Atom will mess up its c++ ROMol container, so on > container/element-type objects the flag's typically a "not". > This is helpful, thank you. If I do end up exposing the Atom in top level (mathematica in my case), then I will need to do something similar with the wrapper class. Jason > > Dima > > > _______________________________________________ > Rdkit-discuss mailing list > Rdkit-discuss@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/rdkit-discuss >
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