Reference library

Python Code Samples

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

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Data pipelines & processing easy

Count Records Processed per Category in Python

Use a Counter dictionary to track how many records of each type (ok, error, retry) were processed in a data pipeline.

counter metrics data-pipeline
Python
from collections import Counter
import random

processed_counter = Counter()

def process_records(records):
    for record in records:
        processed_counter[record] += 1
    return len(records)

if __name__ == "__main__":
    sample_records = [random.choice(["ok", "error", "retry"]) for _ in range(10)]
    print(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

  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.