Koan 20: The Unreliable Messenger
Exploring traps in try/finally blocks, and the reasoning behind PEP601 and PEP765
Python Koans
A Python newsletter for developers who want to learn Python through short puzzles and deep explanations
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Koan 19: The Unhelpful Eclipse
On the fragility of unintended behavior and the wisdom of explicit paths
Koan 18: The Loose Bundle
Exploring the pitfalls of raw string literals in Python
Koan 17: The Watchman at the Gate
A look into Python's regex module
Koan 9: The Unfired Pot REDUX
Experience is simply the name we give our mistakes - Oscar Wilde
Koan 16: The Master's Lesson
Why we need "if __name__ == '__main__'"
Koan 15: The Invisible Ink
Understanding Unicode equivalence and the deceptive nature of glyphs
Koan 14: The Missing Grain
When distributing python package_data goes wrong
Koan 13: The Empty Bowl
Understanding Python dataclasses and how fields determine equality and hashing.
Koan 12: The Blacksmith's Hammer
Exploring the dangerous power of unquoted Python strings, and how they caused CVE-2024-9287