from org.csstudio.display.builder.runtime.script import PVUtil
import pickle

data = []
try:
    from ipts_items.data import SampleInfo

    try:
        pickled = PVUtil.getString(pvs[0], True)
        samples = pickle.loads(pickled)
    except:
        samples = [ SampleInfo(-1, dict()) ]
    for sample in samples:
        mass = "%g g" % sample.mass if sample.mass > 0 else "N/A"
        data.append([ str(sample.sample_id),
                      sample.name.decode('utf-8'),
                      sample.description.decode('utf-8'),
                      mass,
                      sample.container.decode('utf-8'),
                      sample.nature.decode('utf-8')
                    ])
except:
    data = [ [ "-1", "", "", "", "", "", "" ] ]

   
# Clear selection to prevent selecting same row in changed data
widget.setSelection(list())
widget.setValue(data)