evaluate.py 文件源码

def evalOrderBy(ctx, part):

    res = evalPart(ctx, part.p)

    for e in reversed(part.expr):

        def val(x):
            v = value(x, e.expr, variables=True)
            if isinstance(v, Variable):
                return (0, v)
            elif isinstance(v, BNode):
                return (1, v)
            elif isinstance(v, URIRef):
                return (2, v)
            elif isinstance(v, Literal):
                return (3, v)

        reverse = bool(e.order and e.order == 'DESC')
        res = sorted(res, key=val, reverse=reverse)

    return res