pickling objects in jython

[Shahin Saadati]

Hi,
The following sample code is to pickle and unpickle an object. It works
fine with CPython, but the unpickling fails in Jython and I receive an
error stating that "A" is unsafe to unpickle (even though I believe I
have the code to make "A" safe for unpickling). What do I do wrong and
how can I fix it?
Thanks,

=============== =============== =============== =
import sys
import cPickle
import copy_reg

class A(object):
__slots__ = ("x","y")
__safe_for_unpi ckling__ = True
def __init__(self, a, b):
self.x = a
self.y = b
def __str__(self):
return str(self.__gets tate__())
def __reduce__(self ):
return (self.__class__ .__name__, self.__getstate __())
def __new__(cls, a, b):
return object.__new__( cls)
def __getnewargs__( self):
return self.__getstate __()
def __getstate__(se lf):
return (self.x, self.y)
def __setstate__(se lf, state):
(self.x, self.y) = state

copy_reg.constr uctor(A)
a = A(5,"abcd")

print "Before Pickling: %s"%str(a)
mfile = open("dumptest" ,"wb")
cPickle.dump(a, mfile,-1)
mfile.close()

mfile = open("dumptest" ,"rb")
m = cPickle.load(mf ile)
print "After Pickling: %s"%str(m)
mfile.close()
=============== =============== =============== =