transformer.py 文件源码

def factor(self, nodelist):
        elt = nodelist[0]
        t = elt[0]
        node = self.lookup_node(nodelist[-1])(nodelist[-1][1:])
        # need to handle (unary op)constant here...
        if t == token.PLUS:
            return UnaryAdd(node, lineno=elt[2])
        elif t == token.MINUS:
            return UnarySub(node, lineno=elt[2])
        elif t == token.TILDE:
            node = Invert(node, lineno=elt[2])
        return node