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Python Code Samples

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

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Database scaling & optimization medium

How to Create a Covering Index with INCLUDE Columns in Python

Create a covering index with INCLUDE columns in SQLite from Python and inspect the query plan to confirm the index covers the query.

sqlite indexing covering index
Python
import sqlite3

def create_covering_index_mock():
    conn = sqlite3.connect(":memory:")
    cursor = conn.cursor()

    cursor.execute("""
        CREATE TABLE employees (
            id INTEGER PRIMARY KEY,
            name TEXT,
            department TEXT,
            salary INTEGER
        )
    """)

    employe…
15 0 Open

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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

  1. Pick a topic section — strings, lists, files, functions, and more
  2. Open a sample, read How it works, and copy the code block
  3. 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.