Lightning Prototyping

Using redis-helper & ipython in the command-line

Resources

• https://docs.python.org/3/tutorial/datastructures.html
• https://redis.io/topics/data-types-intro
• https://redis.io/commands
• https://github.com/andymccurdy/redis-py
• https://github.com/kenjyco/redis-helper

Why Redis?

• super fast in-memory database used by many companies large and small
• it is a "data structure server", so we can make use of efficient operations on a variety of fundamental data structures
  • hash
  • set
  • sorted set
  • list
  • pub sub

Some Redis Commands

• hash: hmset, hget, hmget, hgetall, hincrby
• set: sadd, srem, scard, smembers, sinterstore, sunionstore
• sorted set: zadd, zrem, zcard, zrange, zrangebyscore, zinterstore
• list: lpush, lpop, rpush, rpop, llen

Why ipython?

• awesome Python interpreter
• tab-completion
• syntax highlighting as you type
• you can embed it in your programs

Why redis-helper?

• low learning curve
• minimal boilerplate
• easy to configure
• very fast
• one-line model definitions
• easy to integrate in existing APIs
• simplifies data access patterns
• gather data or count metrics at multiple time ranges (at once)
• built to explore in the shell

How?

• modify your ~/.config/redis-helper/settings.ini file
• create an instance of redis_helper.Collection
• use the add method to add an item to the collection
• use the get method to get some data about an item in the collection
• use the update method to update/modify data for a particular item in the collection
• use the delete method to delete an item from the collection
• use the index_field_info method to get information about the indexed fields in the collection
• use the find method to filter through indexed fields to find matching items

Demo...