util.py 文件源码

def load(self, name):
        if name in self.impls:
            return self.impls[name]()
        else:
            import pkg_resources
            for impl in pkg_resources.iter_entry_points(
                    self.group,
                    name):
                self.impls[name] = impl.load
                return impl.load()
            else:
                from mako import exceptions
                raise exceptions.RuntimeException(
                    "Can't load plugin %s %s" %
                    (self.group, name))