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Python code samples

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

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Detect and Remove Blurry Images in Python with OpenCV

Automatically scan a directory of images, detect blur using Laplacian variance, and remove blurry images with a dry-run option for safety.

opencv image-processing automation

Python

from pathlib import Path
import cv2
import numpy as np

def is_blurry(image_path, threshold=100.0):
    """
    Detect if an image is blurry using Laplacian variance.
    Returns True if blurry, False otherwise.
    """
    img = cv2.imread(str(image_path), cv2.IMREAD_GRAYSCALE)
    if img is None:
        return True…

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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.