Reference library

Python code samples

Easy snippets you can copy, study, and run in the browser editor.

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Create a Personal Knowledge Base That Searches Notes Instantly in Python

Build a lightweight personal knowledge base with JSON storage and instant case-insensitive full-text search across note titles and content.

json knowledge base search

Python

import json
import re
import sys

class PersonalKnowledgeBase:
    def __init__(self, file_path="kb_notes.json"):
        self.file_path = file_path
        self.notes = self._load_notes()

    def _load_notes(self):
        try:
            with open(self.file_path, "r") as f:
                return json.load(f)
    …

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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.

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.