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

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Build a Python Tool to Find All API Endpoints on a Website

A Python script that crawls a website, searches for common API endpoint patterns in HTML and JavaScript, and returns all discovered public API URLs.

api web-crawling automation

Python

import re
import requests
from urllib.parse import urljoin, urlparse
from collections import deque

def find_api_endpoints(base_url, max_pages=10):
    visited = set()
    queue = deque([base_url])
    api_endpoints = set()
    
    api_patterns = [
        r'/api/[a-zA-Z0-9_/-]+',
        r'/v[0-9]+/[a-zA-Z0-9_/-]+',…

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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.

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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.