Re: Cython + Pickle: Can't pickle <type ...> it's not found as ...

It appears I had something funny going on with setuptools/distutils/
distribute/easy_install/pip. Moreover, my version control shows no
changes and it works now. 

On Feb 1, 5:55 pm, Robert Bradshaw <rober... <at> math.washington.edu>
wrote:
> On Tue, Feb 1, 2011 at 12:01 PM, Carl Vondrick <cvondr... <at> gmail.com> wrote:
> > I'm trying to pickle one of my Cython classes. It's defined like:
>
> > cdef class Box(object):
> >   def __init__(self, a):
> >      self.a = a
>
> >   def __reduce__(self):
> >       return (Box, (self.a,))
>
> > But, when I pickle this object, I get the error:
>
> > a = Box(1)
> > pickle.dump(a, open("foo", "w"))
>
> > I get the error: Can't pickle <type 'module.Box'>: it's not found as
> > module.Box
>
> > For what it's worth, the Box class is defined in an external module
> > installed via setuptools.
>
> > Any idea what's going on? As far as I can tell, the __reduce__ method
> > isn't even being called.
>
> No idea, that works fine for me (well, inserting "cdef object a" into
> Box's definition first).
>
> - Robert
>
> -------------------------------------------------------------------
>
> import pickle
>
> cdef class Box(object):
>   cdef a
>   def __init__(self, a):
>      self.a = a
>
>   def __reduce__(self):
>       return (Box, (self.a,))
>
>   def __repr__(self):
>       return "Box(%s)" % self.a
>
> a = Box(1)
> print "a", a
> s = pickle.dumps(a)
> print "s", s
> print pickle.loads(s)