Redis 4.x Cookbook

Running Lua scripts

redis-py provides a very convenient register_script() function to register Lua scripts. register_script() will return a Script instance, which can be used as a function to invoke Lua scripts later. In the Using Lua recipe of Chapter 3, Data Features, we used SCRIPT LOAD and EVALSHA to cache a Lua script and reuse it. Let's see how we can do it in redis-py:

The content of updateJson.lua can be found in the Using Lua recipe of Chapter 3, Data Features.

Create RedisLuaDemo.py with the following code:

The output of the program will be the updated JSON value:

{"grade":"C","name":"Tina","sex":"female"}