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Re: ImportError with pickle (Python 2.7.9), possibly platform dependent

References <494551ca-532f-4d4d-aff0-a3932416c8f4@googlegroups.com> <mailman.108.1430354695.3680.python-list@python.org> <20a5c7bf-2163-4b7a-8495-30ce23239903@googlegroups.com>
Date 2015-05-01 22:09 +1000
Subject Re: ImportError with pickle (Python 2.7.9), possibly platform dependent
From Chris Angelico <rosuav@gmail.com>
Newsgroups comp.lang.python
Message-ID <mailman.9.1430482176.3347.python-list@python.org> (permalink)

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On Fri, May 1, 2015 at 9:01 PM, Ben Sizer <kylotan@gmail.com> wrote:
> Another good question, and this gives us the answer. The module lists are quite different, as I'd expect because the load happens in the context of the full application whereas the dump happens as a standalone script. But literally every module that is in the 'before dump' list is in the 'before load' list - except OMDBMap. Like the error says! What /is/ in the 'before load' list however is "my_wsgi_app.OMDBMap". The module has been imported, but the pickle algorithm is unable to reconcile the module in the WSGI app's namespace with the module referenced in the pickle file.
>
> So... I don't know how to fix this, but I do now know why it fails, and I have a satisfactory answer for why it is acting differently on the Linux server (and that is just because that is the only one running under WSGI). Two out of three isn't bad!
>

Cool! That's part way. So, can you simply stuff OMDBMap into
sys.modules prior to loading? It might be a bit of a hack, but it
should work for testing, at least. Conversely, you could change the
dump script to import via the name my_wsgi_app to make it consistent.

ChrisA

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Thread

ImportError with pickle (Python 2.7.9), possibly platform dependent Ben Sizer <kylotan@gmail.com> - 2015-04-29 09:01 -0700
  Re: ImportError with pickle (Python 2.7.9), possibly platform dependent Chris Angelico <rosuav@gmail.com> - 2015-04-30 10:44 +1000
    Re: ImportError with pickle (Python 2.7.9), possibly platform dependent Ben Sizer <kylotan@gmail.com> - 2015-05-01 04:01 -0700
      Re: ImportError with pickle (Python 2.7.9), possibly platform dependent Chris Angelico <rosuav@gmail.com> - 2015-05-01 22:09 +1000
        Re: ImportError with pickle (Python 2.7.9), possibly platform dependent Ben Sizer <kylotan@gmail.com> - 2015-05-13 03:23 -0700
      Re: ImportError with pickle (Python 2.7.9), possibly platform dependent Peter Otten <__peter__@web.de> - 2015-05-01 14:34 +0200
        Re: ImportError with pickle (Python 2.7.9), possibly platform dependent Ben Sizer <kylotan@gmail.com> - 2015-05-13 03:27 -0700

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