@dispatch(object)
def scrub_keys(o):
 raise NotImplementedError(('scrub_keys not implemented for type %r' % type(o).__name__))

@ dispatch ( object ) def scrub_keys ( o ) : raise NotImplementedError ( ( 'scrub_keys not implemented for type %r' % type ( o ) . __name__ ) )
add an ascending sort key when pass a string .