code: def _get_fault_type_hanging_wall(self, rake):
          
          F, HW = 0, 0
  
          if 45 <= rake <= 135:
              F, HW = 1, 1
  
          return F, HW
docs: Return fault type (F) and hanging wall (HW) flags depending on rake
          angle.
  
          The method assumes 'reverse' (F = 1) if 45 <= rake <= 135, 'other'
          (F = 0) if otherwise. Hanging-wall flag is set to 1 if 'reverse',
          and 0 if 'other'.