transformer.py 文件源码

def com_call_function(self, primaryNode, nodelist):
        if nodelist[0] == token.RPAR:
            return CallFunc(primaryNode, [], lineno=extractLineNo(nodelist))
        args = []
        kw = 0
        star_node = dstar_node = None
        len_nodelist = len(nodelist)
        i = 1
        while i < len_nodelist:
            node = nodelist[i]

            if node[0]==token.STAR:
                if star_node is not None:
                    raise SyntaxError, 'already have the varargs indentifier'
                star_node = self.com_node(nodelist[i+1])
                i = i + 3
                continue
            elif node[0]==token.DOUBLESTAR:
                if dstar_node is not None:
                    raise SyntaxError, 'already have the kwargs indentifier'
                dstar_node = self.com_node(nodelist[i+1])
                i = i + 3
                continue

            # positional or named parameters
            kw, result = self.com_argument(node, kw, star_node)

            if len_nodelist != 2 and isinstance(result, GenExpr) \
               and len(node) == 3 and node[2][0] == symbol.comp_for:
                # allow f(x for x in y), but reject f(x for x in y, 1)
                # should use f((x for x in y), 1) instead of f(x for x in y, 1)
                raise SyntaxError, 'generator expression needs parenthesis'

            args.append(result)
            i = i + 2

        return CallFunc(primaryNode, args, star_node, dstar_node,
                        lineno=extractLineNo(nodelist))