code: def db996(self, value=None):
          
          if value is not None:
              try:
                  value = float(value)
              except ValueError:
                  raise ValueError('value {} need to be of type float '
                                   'for field `db996`'.format(value))
  
          self._db996 = value
docs: Corresponds to IDD Field `db996`
          Dry-bulb temperature corresponding to 99.6% annual cumulative
          frequency of occurrence (cold conditions)
  
          Args:
              value (float): value for IDD Field `db996`
                  Unit: C
                  if `value` is None it will not be checked against the
                  specification and is assumed to be a missing value
  
          Raises:
              ValueError: if `value` is not a valid value