Pickle-able items in multiprocessing

[Duc Trinh]

I'm applying multiprocessing for pairing elements in a group, but when i used Queue() to collect the results, it yields an error of:

PicklingError: Can't pickle <type 'pairing.Element'>: import of module pairing failedEnter code here...

Anyone can help with this problem?

Thanks in advance

[Marcos Portnoi]

It seems the Pickle module is complaining it does not know how to serialize the pairing.Element object. You might have to implement an additional helper function such that Pickle can call the proper serialize() function from the charm.toolbox.pairinggroup or similar.

The same happens when using JSON with pairing.Element: one has to implement a KeyDecoder/KeyEncoder helper class to serialize pairing.Element objects.

[Edoardo Marangone]

Is there a solution now? I'm trying to save the ciphertext and the key in a database, but I can't because there is no possibility to create a JSON from the pairing.Element object.

How can I save the ciphertext and the key in a database?

Thanks.