Cannot send Function to Pyro

Question

I am able to send math.sqrt over a Pyro connection however I cannot send a function that I have defined myself over a Pyro connection.

When I do, I get an Pickle Function Error.

Both the receiving module and the sending module have the function defined.

Pyro.core.initClient()
    connection = Pyro.core.getProxyForURI("PYRONAME://HelloWOlrd")

print connection.makeRequest(my_function)

And in my receiving side:

def makeRequest(self, function):
    return function(9)

Again, if I send a math.sqrt function over the connection, it prints out 3 which is expected, though If I try to send over a function I made, it gives me a pickle error:

cPickle.PicklingError: Can't pickle : attribute lookup builtin.function failed

Again both the receieving module and the sending module have the function defined in their namescapes.

Does anyone know how I can solve this issue?

Answer 1

You cannot pickle class method, there is an enhancement request about it http://bugs.python.org/issue9276

See there for what objects can be picked and modify your code appropriate.