def __len__(self):
		"""Get a list of the public data attributes."""
		return len([i for i in (set(dir(self)) - self._STANDARD_ATTRS) if i[0] != '_'])
def __len__ ( self ) : return len ( [ i for i in ( set ( dir ( self ) ) - self . _STANDARD_ATTRS ) if i [ 0 ] != '_' ] )
Get a list of the public data attributes.