code: def get_exttype(self, num=False):
          
          if num:
              return self._info['hdutype']
          else:
              name = _hdu_type_map[self._info['hdutype']]
              return name
docs: Get the extension type
  
          By default the result is a string that mirrors
          the enumerated type names in cfitsio
              'IMAGE_HDU', 'ASCII_TBL', 'BINARY_TBL'
          which have numeric values
              0 1 2
          send num=True to get the numbers.  The values
              fitsio.IMAGE_HDU .ASCII_TBL, and .BINARY_TBL
          are available for comparison
  
          parameters
          ----------
          num: bool, optional
              Return the numeric values.