Thanks for the replies, the presentation i mentioned was at: https://ep2013.europython.eu/media/conference/slides/advanced-pickling-with-stackless-python-and-spickle.pdf
I'll look into the other replies tomorrow, it's late .. Cheers, Lars On Thu, Jan 9, 2014 at 12:11 PM, Christian Tismer <[email protected]>wrote: > On 09.01.14 11:31, Anselm Kruis wrote: > >> Hi Lars, >> >> ... >> >> You wrote "the loaded model seems to use a pre-change class definition". >> Probably you observe the following: if you pickle a tasklet, the tasklet >> contains the list of frames on the stack. Each frame represents a running >> function, but the frame does not reference the function object but the code >> object of the function. Now code objects are always pickled by value. Upon >> unpickling you get the old code objects. With other words, you can't >> magically modify the code, that currently executes. Pickling code objects >> by value is required, because local variables, cells, code and the >> instruction pointer must be in an consistent state. >> > > Well, Lars also asked > > > """ > So my questions are, is this caused by stackless (compared to vanilla > python) and if so, what triggers the pickling of modules and how can i > influence that or use the vanilla version of pickle instead. > """ > > Because he considered to use the vanilla python pickling, I assumed > that no tasklets are involved. > That is a very special and known stackless feature. > > But maybe that is the bug, and there are unwanted references to tasklets > in the model by chance. To avoid this, removing or running all tasklets > to their end before pickling should help. > > cheers -- chris > > > -- > Christian Tismer :^) <mailto:[email protected]> > Software Consulting : Have a break! Take a ride on Python's > Karl-Liebknecht-Str. 121 : *Starship* http://starship.python.net/ > 14482 Potsdam : PGP key -> http://pgp.uni-mainz.de > phone +49 173 24 18 776 fax +49 (30) 700143-0023 > PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 > whom do you want to sponsor today? http://www.stackless.com/ > > > _______________________________________________ > Stackless mailing list > [email protected] > http://www.stackless.com/mailman/listinfo/stackless > -- ==================================== Lars van Gemerden [email protected] +31 6 26 88 55 39 ====================================
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