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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _read_chan_name(orig):
 """Read channel labels, which can be across xml files. Parameters orig : dict contains the converted xml information Returns ------- list of str list of channel names ndarray vector to indicate to which signal a channel belongs to Notes ----- This assumes that the PIB Box is the second signal. """

    sensors = orig['sensorLayout'][1]

    eeg_chan = []
    for one_sensor in sensors:
        if one_sensor['type'] in ('0', '1'):
            if one_sensor['name'] is not None:
                eeg_chan.append(one_sensor['name'])
            else:
                eeg_chan.append(one_sensor['number'])

    pns_chan = []
    if 'pnsSet' in orig:
        pnsSet = orig['pnsSet'][1]
        for one_sensor in pnsSet:
            pns_chan.append(one_sensor['name'])

    return eeg_chan + pns_chan, len(eeg_chan)