python object via channel access

client.py

#!/usr/bin/env python

import pickle
from CaChannel import ca, CaChannel

chan = CaChannel('MTEST:OBJECT')
chan.searchw()
a = chan.getw(ca.DBR_STRING)

pvdb = pickle.loads(a)
print(pvdb)

server.py

#!/usr/bin/env python

import pickle
from pcaspy import Driver, SimpleServer

prefix = 'MTEST:'
pvdb = {
    'OBJECT' : {
        'type': 'char',
        'count': 1024,
    },
}

class myDriver(Driver):
    def  __init__(self):
        super(myDriver, self).__init__()
        self.setParam('OBJECT', pickle.dumps(pvdb))
        self.updatePVs()

if __name__ == '__main__':
    server = SimpleServer()
    server.createPV(prefix, pvdb)
    driver = myDriver()

    # process CA transactions
    while True:
        server.process(0.1)