ImportError with pickle (Python 2.7.9), possibly platform dependent

[Chris Angelico]

On Fri, May 1, 2015 at 9:01 PM, Ben Sizer <kylotan at 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