serialize object in jython, read into python

[Kent Johnson]

py wrote:
> I want to serialize an object in jython and then be able to read it in
> using python, and vice versa.
> 
> Any suggestions on how to do this?  pickle doesnt work, nor does using
> ObjectOutputStream (from jython).
> 
> I prefer to do it file based ...something like
> 
> pickle.dump(someObj, open("output.txt", "w"))
> 
> as opposed to shelve
> 
> f = shelve.open("output.txt")
> f['somedata'] = someObj

It works for me. I think the problem is that your pickle file is not closed properly, when 
I tried it with the form you have above the file was never written. Here is an example 
that works with Jython 2.1 and Python 2.4.2:

D:\WUTemp>jython
Jython 2.1 on java1.4.2_06 (JIT: null)
Type "copyright", "credits" or "license" for more information.
 >>> a='hello world'
 >>> b=tuple(range(10))
 >>> c={ 'a':1, 'b':2, 'c':3}
 >>> class Foo:
...   pass
...
 >>> d=Foo()
 >>> lst=[a,b,c,d]
 >>> lst
['hello world', (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), {'b': 2, 'a': 1, 'c': 3}, <__main__.Foo 
instance at 17930334>]
 >>> f=open('pickle.txt', 'wb')
 >>> import pickle
 >>> pickle.dump(lst, f)
 >>> f.close()
 >>> ^Z

D:\WUTemp>python
Python 2.4.2 (#67, Sep 28 2005, 12:41:11) [MSC v.1310 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
  >>> import pickle
  >>> class Foo:
  ...   pass
  ...
  >>> f=open('pickle.txt')
  >>> lst = pickle.load(f)
  >>> f.close()
  >>> lst
['hello world', (0, 1, 2, 3, 4, 5, 6, 7, 8, 9), {'a': 1, 'c': 3, 'b': 2}, <__main__.Foo 
instance at 0x00A51350>]
  >>>

Kent