Problem with an OrderedDict

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Hi list,

I _need_ to have Pyro4 pass a huge OD; however, the echoserver example
I modified for test (see attachment) is breaking with:

First start the built-in test echo server with something like:
$ python -m Pyro4.test.echoserver
Enter the server's uri that was printed:
PYRO:test.echoserver@localhost:37305
------------
got back from the server: hello
------------
got back from the server: [1, 2, 3, 4]
------------
NATIVE = {'qs': 56, 'az': 20, 'wx': 78}
got back from the server: {u'qs': 56, u'az': 20, u'wx': 78}
------
NATIVE = OrderedDict([('wx', 78), ('qs', 56), ('az', 20)])
Traceback (most recent call last):
  File "client.py", line 46, in <module>
    response = echoserver.echo( do )
  File
"/usr/local/lib/python2.7/dist-packages/Pyro4-4.34-py2.7.egg/Pyro4/core.py",
line 169, in __call__ return self.__send(self.__name, args, kwargs) File
"/usr/local/lib/python2.7/dist-packages/Pyro4-4.34-py2.7.egg/Pyro4/core.py",
line 367, in _pyroInvoke compress=Pyro4.config.COMPRESSION) File
"/usr/local/lib/python2.7/dist-packages/Pyro4-4.34-py2.7.egg/Pyro4/util.py",
line 167, in serializeCall data = self.dumpsCall(obj, method, vargs,
kwargs) File
"/usr/local/lib/python2.7/dist-packages/Pyro4-4.34-py2.7.egg/Pyro4/util.py",
line 456, in dumpsCall return serpent.dumps((obj, method, vargs,
kwargs), module_in_classname=True) File
"build/bdist.linux-x86_64/egg/serpent.py", line 67, in dumps File
"build/bdist.linux-x86_64/egg/serpent.py", line 223, in serialize File
"build/bdist.linux-x86_64/egg/serpent.py", line 254, in _serialize File
"build/bdist.linux-x86_64/egg/serpent.py", line 304, in
ser_builtins_tuple File "build/bdist.linux-x86_64/egg/serpent.py", line
254, in _serialize File "build/bdist.linux-x86_64/egg/serpent.py", line
304, in ser_builtins_tuple File
"build/bdist.linux-x86_64/egg/serpent.py", line 254, in _serialize File
"build/bdist.linux-x86_64/egg/serpent.py", line 471, in
ser_default_class File "build/bdist.linux-x86_64/egg/serpent.py", line
254, in _serialize File "build/bdist.linux-x86_64/egg/serpent.py", line
360, in ser_builtins_dict File
"build/bdist.linux-x86_64/egg/serpent.py", line 254, in _serialize File
"build/bdist.linux-x86_64/egg/serpent.py", line 327, in
ser_builtins_list File "build/bdist.linux-x86_64/egg/serpent.py", line
254, in _serialize File "build/bdist.linux-x86_64/egg/serpent.py", line
327, in ser_builtins_list File
"build/bdist.linux-x86_64/egg/serpent.py", line 254, in _serialize File
"build/bdist.linux-x86_64/egg/serpent.py", line 327, in
ser_builtins_list File "build/bdist.linux-x86_64/egg/serpent.py", line
254, in _serialize File "build/bdist.linux-x86_64/egg/serpent.py", line
327, in ser_builtins_list File
"build/bdist.linux-x86_64/egg/serpent.py", line 254, in _serialize File
"build/bdist.linux-x86_64/egg/serpent.py", line 312, in
ser_builtins_list ValueError: Circular reference detected (list)


This OD contains a DB structure with user rights on each and every
object.

This is a real problem, as if I can't have an OD to be correctly
processed, I'll be obliged to add numbering into a regular dict,
reorder everything at either emission and reception, and other
processing that'll take a lot of code.

So, is it possible to fix this issue and how?

Jean-Yves
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from __future__ import print_function
import sys

import Pyro4
import Pyro4.util


print("First start the built-in test echo server with something like:")
print("$ python -m Pyro4.test.echoserver")
print("Enter the server's uri that was printed:")

if sys.version_info < (3, 0):
    uri = raw_input()
else:
    uri = input()

uri = uri.strip()
echoserver = Pyro4.Proxy(uri)

print("------------")

response = echoserver.echo("hello")
print("got back from the server: %s" % response)

print("------------")

response = echoserver.echo([1, 2, 3, 4])
print("got back from the server: %s" % response)

print("------------")

# NORMAL DICT
dn = {'wx':78,'qs':56,'az':20}
print("NATIVE = %s" % dn)
response = echoserver.echo( dn )
print("got back from the server: %s" % response)
# MUST OUTPUT: {'qs': 56, 'az': 20, 'wx': 78}
print("------")
# OrderedDict (REMEMBERS INSERTION ORDER)
from collections import OrderedDict as OD
do = OD()
do['wx']=78
do['qs']=56
do['az']=20
print("NATIVE = %s" % do)
response = echoserver.echo( do )
print("got back from the server: %s" % response)
# MUST OUTPUT: OrderedDict([('wx', 78), ('qs', 56), ('az', 20)])

print("------------")


try:
    echoserver.error()
except:
    print("\ncaught an exception (expected), traceback:")
    print("".join(Pyro4.util.getPyroTraceback()))

print("\nshutting down the test echo server. (restart it if you want to run this again)")
echoserver.shutdown()

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