PR #70 breaks parameter .get and .set functionality

[peendebak]

I cannot debug the issue properly because all the objects are multiprocessing objects. A minimal example showing the issue:

%matplotlib nbagg
import matplotlib.pyplot as plt
import time
import numpy as np
import qcodes as qc

from toymodel import AModel, MockGates, MockSource, MockMeter, AverageGetter, AverageAndRaw

# now create this "experiment"
model = AModel()
gates = MockGates('gates', model=model)

c0, c1, c2 = gates.chan0, gates.chan1, gates.chan2
print('fine so far...')

print('error...')
c2.get()
print('no effect?')
c2.set(0.5)

[peendebak]

#87 fixes the example, but there are still some funny things going on. The AModel object works, but I have no idea where the data is stored and how I can access this data.

This probably has to do with the ServerManager object and multiprocessing.

import matplotlib.pyplot as plt
import time, os
import numpy as np
import qcodes as qc

from toymodel import AModel, MockGates, MockSource, MockMeter

# now create this "experiment"
model = AModel()
gates = MockGates('gates', model=model)
meter = MockMeter('meter', model=model)


c0, c1, c2 = gates.chan0, gates.chan1, gates.chan2


print('c2.get: %s' % c2.get() )
print('model.gates: %s' % ( str(model._gates )) )
print('meter.amplitude: %f' % meter.amplitude.get() )
print('model._output() * model._excitation %f' % ( model._output() * model._excitation ) )
print('fine so far...')

# Now set c2
c2.set(0.5)

# model._gates is all zero!
print('c2.get: %s' % c2.get() )
print('model.gates: %s' % ( str(model._gates )) )
print('meter.amplitude: %f' % meter.amplitude.get() )
print('model._output() * model._excitation %f' % (model._output() * model._excitation ) )

print('meter.amplitude has changed, but not the model...')

model._gates[2]=10
print('c2.get: %s' % c2.get() )
print('model.gates: %s' % ( str(model._gates )) )
print('meter.amplitude: %f' % meter.amplitude.get() )
print('model._output() * model._excitation %f' % (model._output() * model._excitation ) )

print('meter.amplitude unchanged, but the model output has...')

[AdriaanRol]

PR of @alexcjohnson pending

[alexcjohnson]

Closed by #261 (and the whole issue is close to moot already)