Reference library

Python Code
Samples

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

1 match

How to Add TTL Jitter to Cache Expiration in Python

A Python decorator that adds random jitter to cache TTLs, staggering expiration times to prevent cache avalanche.

import random
import time
from functools import wraps

def add_jitter(ttl: float, jitter_range: float = 0.1) -> float:
    """Add random jitter (as % of TTL) to stagger cache expiration and prevent avalanche."""
    jitter = random.uniform(-jitter_range, jitter_range)
    return ttl * (1 + jitter)

def cache_with_jitt…

15 0 Open

Browse by section

Each section groups closely related Python snippets.

Guide: free Python code samples library

Copy-ready Python snippets for learners and developers

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.

How to use this library

Pick a topic section — strings, lists, files, functions, and more
Open a sample, read How it works, and copy the code block
Run it in the IDE, tweak values, then take a related quiz or tutorial lesson

Samples vs tutorials and challenges

Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.

Free online Python IDE Write and run Python in your browser — no install. Free Python code formatter Format with autopep8 — side-by-side PEP 8 cleanup.