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Copy-ready Python snippets by topic and difficulty — short, focused, and runnable in the browser editor.

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Caching & Redis easy

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…
12 0 Open
Caching & Redis easy

How to Use Redis ZADD and ZRANGE in Python

Add members to a Redis sorted set with ZADD and retrieve them in score order with ZRANGE in Python.

redis sorted-set zadd
Python
import redis

client = redis.Redis(host='localhost', port=6379, db=0)

client.delete('scores')

members = {'alice': 30, 'bob': 20, 'carol': 50}
for name, score in members.items():
    client.zadd('scores', {name: score})

result = client.zrange('scores', 0, -1)
print(result)
12 0 Open

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PythonSkillset code samples are short, focused examples organised by topic and difficulty. Every snippet is server-rendered HTML — readable by search engines and easy to copy. Open any sample, read the notes, copy the code, then press Try in editor to run it in the browser with Pyodide.

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