Reference library

Python Code Samples

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

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Concurrency & performance medium

Profile Memory Usage with tracemalloc Snapshot Diff in Python

Use tracemalloc to take two memory snapshots, compute a diff, and print the top changes (size and count) by line number.

tracemalloc memory-profile performance
Python
import tracemalloc

def profile_memory():
    tracemalloc.start()
    
    # Allocate some objects to track
    data = [i * 2 for i in range(10000)]
    text = "x" * 5000
    nested = {"key": [1, 2, 3], "value": (4, 5)}
    
    # Take first snapshot
    snapshot1 = tracemalloc.take_snapshot()
    
    # Free some mem…
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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.