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Caching & Redis

Cache-aside, TTL, invalidation, hot keys, and in-memory lookup patterns at scale.

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How to Build a Redis Leaderboard with ZREVRANGE in Python

Build a sorted leaderboard by storing player scores as a Redis sorted set and reading the top scores with ZREVRANGE in Python.

redis leaderboard zrevrange
Python 
import redis
import random

# Connect to local Redis (ensure Redis is running on localhost:6379)
r = redis.Redis(host="localhost", port=6379, db=0, decode_responses=True)

# Clear any existing test data
r.delete("game_scores")

# Simulate player scores
players = ["alice", "bob", "charlie", "dave", "eve"]
for player in…
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