templating.py 文件源码

def _iter_loaders(self, template):
        loader = self.app.jinja_loader
        if loader is not None:
            yield loader, template

        # old style module based loaders in case we are dealing with a
        # blueprint that is an old style module
        try:
            module, local_name = posixpath.normpath(template).split('/', 1)
            blueprint = self.app.blueprints[module]
            if blueprint_is_module(blueprint):
                loader = blueprint.jinja_loader
                if loader is not None:
                    yield loader, local_name
        except (ValueError, KeyError):
            pass

        for blueprint in itervalues(self.app.blueprints):
            if blueprint_is_module(blueprint):
                continue
            loader = blueprint.jinja_loader
            if loader is not None:
                yield loader, template