Redis + Lua

redis_lua.py

import redis
import functools
from collections import namedtuple

# TODO:
#  - better to implement lua methods as descriptors?
#  - get lua code from *.lua files


class BaseEvaluator(object):

    LuaFunction = namedtuple("LuaFunction", ["name", "code", "nkeys", "docs"])

    def __init__(self, code, redis_client):
        self.redis_client = redis_client

    def __getitem__(self, method):
        raise KeyError("Not Implemented")

    def __contains__(self, method):
        raise KeyError("Not Implemented")

    def evaluate(self, lua_function, *args):
        return self.redis_client.eval(lua_function.code, lua_function.nkeys, *args)

    def __getattr__(self, method_name):

        if method_name in self:
            lua_function = self[name]

            def function(*args):
                return self.evaluate(lua_function)

            function.__name__ = lua_function.name
            function.__doc__ = lua_function.docs

            return function

        else:
            msg = "{} has no method called {}".format(self.__class__.__name__, method_name)
            raise AttributeError(msg)


class EvaluatorFromDir(Evaluator):

    def __init__(self, code_dir, redis_client):
        self.definitions =

Starting to play with redis + lua.