expr.py 文件源码

def visit_Call_35(self, node, side=None, **kwargs):
        """ in 3.5 the starargs attribute was changed to be more flexible,
        #11097 """

        if isinstance(node.func, ast.Attribute):
            res = self.visit_Attribute(node.func)
        elif not isinstance(node.func, ast.Name):
            raise TypeError("Only named functions are supported")
        else:
            try:
                res = self.visit(node.func)
            except UndefinedVariableError:
                # Check if this is a supported function name
                try:
                    res = FuncNode(node.func.id)
                except ValueError:
                    # Raise original error
                    raise

        if res is None:
            raise ValueError("Invalid function call {0}".format(node.func.id))
        if hasattr(res, 'value'):
            res = res.value

        if isinstance(res, FuncNode):

            new_args = [self.visit(arg) for arg in node.args]

            if node.keywords:
                raise TypeError("Function \"{0}\" does not support keyword "
                                "arguments".format(res.name))

            return res(*new_args, **kwargs)

        else:

            new_args = [self.visit(arg).value for arg in node.args]

            for key in node.keywords:
                if not isinstance(key, ast.keyword):
                    raise ValueError("keyword error in function call "
                                     "'{0}'".format(node.func.id))

                if key.arg:
                    # TODO: bug?
                    kwargs.append(ast.keyword(
                        keyword.arg, self.visit(keyword.value)))  # noqa

            return self.const_type(res(*new_args, **kwargs), self.env)