def get_monitor_info(self, irrad, level):
    (age, decay) = (NULL_STR, NULL_STR)
    positions = self._get_level_positions(irrad, level)
    if positions:
        position = positions[0]
        opt = position.get('options')
        if opt:
            age = position.get('monitor_age', NULL_STR)
        decayd = position.get('decay_constants')
        if decayd:
            decay = decayd.get('lambda_k_total', NULL_STR)
    return (str(age), str(decay))
def get_monitor_info(self, irrad, level):
    (age, decay) = (NULL_STR, NULL_STR)
    positions = self._get_level_positions(irrad, level)
    if positions:
        position = positions[0]
        opt = position.get('options')
        if opt:
            age = position.get('monitor_age', NULL_STR)
        decayd = position.get('decay_constants')
        if decayd:
            decay = decayd.get('lambda_k_total', NULL_STR)
    return (str(age), str(decay))