How to use the arbor.cell_member function in arbor

hint.gpu_group_size = 1000
print(f'{hint}')

hints = dict([(arbor.cell_kind.cable, hint)])
decomp = arbor.partition_load_balance(recipe, context, hints)
print(f'{decomp}')

meters.checkpoint('load-balance', context)

sim = arbor.simulation(recipe, decomp, context)

meters.checkpoint('simulation-init', context)

spike_recorder = arbor.attach_spike_recorder(sim)

pid = arbor.cell_member(0,0) # cell 0, probe 0
# Attach a sampler to the voltage probe on cell 0.
# Sample rate of 1 sample every ms.
sampler = arbor.attach_sampler(sim, 1, pid)

sim.run(100)
print(f'{sim} finished')

meters.checkpoint('simulation-run', context)

print(f'{arbor.meter_report(meters, context)}')

for sp in spike_recorder.spikes:
    print(sp)

print('voltage samples for probe id ', end = '')
print(pid, end = '')