En Mon, 05 Jan 2009 23:04:30 -0200, Zac Burns <zac...@gmail.com> escribió:
I have a module that attempts to pickle classes defined in that module.
I get an error of the form:
PicklingError: Can't pickle <class 'Module.SubModule.Class'>: import
of module Module.SubModule failed
when using cPickle (protocol -1, python version 2.5.1).
The module has already been imported and is in sys.modules when the
exception is raised.
There is no thing as a "submodule"; very likely you have a package, and a
module inside that package.
- always import the "submodules" from the package, not directly (relative
imports are safer)
- in general, don't play with PYTHONPATH, sys.path, and such things.
- don't directly execute a module inside a package (it's name is always
__main__ and it doesn't even "know" it's part of a package).
Using pickle instead of cPickle works, but the section of the code is
performance critical.
Could you provide a short example? I'd say that if you stick to the above
rules you won't have the issue again, but anyway I'd like to know in which
cases Pickle and cPickle differ.
--
Gabriel Genellina
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