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<h1 align="center">What the f*ck Python! 😱</h1> <h1 align="center">What the f*ck Python! 😱</h1>
<p align="center">Exploring and understanding Python through surprising snippets.</p> <p align="center">Exploring and understanding Python through surprising snippets.</p>
Translations: [Chinese 中文](https://github.com/robertparley/wtfpython-cn) | [Vietnamese Tiếng Việt](https://github.com/vuduclyunitn/wtfptyhon-vi) | [Spanish Español](https://web.archive.org/web/20220511161045/https://github.com/JoseDeFreitas/wtfpython-es) | [Korean 한국어](https://github.com/buttercrab/wtfpython-ko) | [Russian Русский](https://github.com/satwikkansal/wtfpython/tree/master/translations/ru-russian) | [German Deutsch](https://github.com/BenSt099/wtfpython) | [Add translation](https://github.com/satwikkansal/wtfpython/issues/new?title=Add%20translation%20for%20[LANGUAGE]&body=Expected%20time%20to%20finish:%20[X]%20weeks.%20I%27ll%20start%20working%20on%20it%20from%20[Y].) Translations: [Chinese 中文](https://github.com/robertparley/wtfpython-cn) | [Vietnamese Tiếng Việt](https://github.com/vuduclyunitn/wtfptyhon-vi) | [Spanish Español](https://web.archive.org/web/20220511161045/https://github.com/JoseDeFreitas/wtfpython-es) | [Korean 한국어](https://github.com/buttercrab/wtfpython-ko) | [Russian Русский](https://github.com/frontdevops/wtfpython) | [German Deutsch](https://github.com/BenSt099/wtfpython) | [Add translation](https://github.com/satwikkansal/wtfpython/issues/new?title=Add%20translation%20for%20[LANGUAGE]&body=Expected%20time%20to%20finish:%20[X]%20weeks.%20I%27ll%20start%20working%20on%20it%20from%20[Y].)
Other modes: [Interactive Website](https://wtfpython-interactive.vercel.app) | [Interactive Notebook](https://colab.research.google.com/github/satwikkansal/wtfpython/blob/master/irrelevant/wtf.ipynb) | [CLI](https://pypi.python.org/pypi/wtfpython) Other modes: [Interactive Website](https://wtfpython-interactive.vercel.app) | [Interactive Notebook](https://colab.research.google.com/github/satwikkansal/wtfpython/blob/master/irrelevant/wtf.ipynb) | [CLI](https://pypi.python.org/pypi/wtfpython)
@ -24,147 +24,84 @@ So, here we go...
<!-- toc --> <!-- toc -->
- [Table of Contents](#table-of-contents)
- [Structure of the Examples](#structure-of-the-examples) - [Structure of the Examples](#structure-of-the-examples)
+ [▶ Some fancy Title](#-some-fancy-title)
- [Usage](#usage) - [Usage](#usage)
- [👀 Examples](#-examples) - [👀 Examples](#-examples)
- [Section: Strain your brain!](#section-strain-your-brain) * [Section: Strain your brain!](#section-strain-your-brain)
- [▶ First things first! \*](#-first-things-first-) + [▶ First things first! *](#-first-things-first-)
- [💡 Explanation](#-explanation) + [▶ Strings can be tricky sometimes](#-strings-can-be-tricky-sometimes)
- [▶ Strings can be tricky sometimes](#-strings-can-be-tricky-sometimes) + [▶ Be careful with chained operations](#-be-careful-with-chained-operations)
- [💡 Explanation:](#-explanation-1) + [▶ How not to use `is` operator](#-how-not-to-use-is-operator)
- [▶ Be careful with chained operations](#-be-careful-with-chained-operations) + [▶ Hash brownies](#-hash-brownies)
- [💡 Explanation:](#-explanation-2) + [▶ Deep down, we're all the same.](#-deep-down-were-all-the-same)
- [▶ How not to use `is` operator](#-how-not-to-use-is-operator) + [▶ Disorder within order *](#-disorder-within-order-)
- [💡 Explanation:](#-explanation-3) + [▶ Keep trying... *](#-keep-trying-)
- [▶ Hash brownies](#-hash-brownies) + [▶ For what?](#-for-what)
- [💡 Explanation](#-explanation-4) + [▶ Evaluation time discrepancy](#-evaluation-time-discrepancy)
- [▶ Deep down, we're all the same.](#-deep-down-were-all-the-same) + [▶ `is not ...` is not `is (not ...)`](#-is-not--is-not-is-not-)
- [💡 Explanation:](#-explanation-5) + [▶ A tic-tac-toe where X wins in the first attempt!](#-a-tic-tac-toe-where-x-wins-in-the-first-attempt)
- [▶ Disorder within order \*](#-disorder-within-order-) + [▶ Schrödinger's variable](#-schrödingers-variable-)
- [💡 Explanation:](#-explanation-6) + [▶ The chicken-egg problem *](#-the-chicken-egg-problem-)
- [▶ Keep trying... \*](#-keep-trying-) + [▶ Subclass relationships](#-subclass-relationships)
- [💡 Explanation:](#-explanation-7) + [▶ Methods equality and identity](#-methods-equality-and-identity)
- [▶ For what?](#-for-what) + [▶ All-true-ation *](#-all-true-ation-)
- [💡 Explanation:](#-explanation-8) + [▶ The surprising comma](#-the-surprising-comma)
- [▶ Evaluation time discrepancy](#-evaluation-time-discrepancy) + [▶ Strings and the backslashes](#-strings-and-the-backslashes)
- [💡 Explanation](#-explanation-9) + [▶ not knot!](#-not-knot)
- [▶ `is not ...` is not `is (not ...)`](#-is-not--is-not-is-not-) + [▶ Half triple-quoted strings](#-half-triple-quoted-strings)
- [💡 Explanation](#-explanation-10) + [▶ What's wrong with booleans?](#-whats-wrong-with-booleans)
- [▶ A tic-tac-toe where X wins in the first attempt!](#-a-tic-tac-toe-where-x-wins-in-the-first-attempt) + [▶ Class attributes and instance attributes](#-class-attributes-and-instance-attributes)
- [💡 Explanation:](#-explanation-11) + [▶ yielding None](#-yielding-none)
- [▶ Schrödinger's variable \*](#-schrödingers-variable-) + [▶ Yielding from... return! *](#-yielding-from-return-)
- [💡 Explanation:](#-explanation-12) + [▶ Nan-reflexivity *](#-nan-reflexivity-)
- [▶ The chicken-egg problem \*](#-the-chicken-egg-problem-) + [▶ Mutating the immutable!](#-mutating-the-immutable)
- [💡 Explanation](#-explanation-13) + [▶ The disappearing variable from outer scope](#-the-disappearing-variable-from-outer-scope)
- [▶ Subclass relationships](#-subclass-relationships) + [▶ The mysterious key type conversion](#-the-mysterious-key-type-conversion)
- [💡 Explanation:](#-explanation-14) + [▶ Let's see if you can guess this?](#-lets-see-if-you-can-guess-this)
- [▶ Methods equality and identity](#-methods-equality-and-identity) + [▶ Exceeds the limit for integer string conversion](#-exceeds-the-limit-for-integer-string-conversion)
- [💡 Explanation](#-explanation-15) * [Section: Slippery Slopes](#section-slippery-slopes)
- [▶ All-true-ation \*](#-all-true-ation-) + [▶ Modifying a dictionary while iterating over it](#-modifying-a-dictionary-while-iterating-over-it)
- [💡 Explanation:](#-explanation-16) + [▶ Stubborn `del` operation](#-stubborn-del-operation)
- [💡 Explanation:](#-explanation-17) + [▶ The out of scope variable](#-the-out-of-scope-variable)
- [▶ Strings and the backslashes](#-strings-and-the-backslashes) + [▶ Deleting a list item while iterating](#-deleting-a-list-item-while-iterating)
- [💡 Explanation](#-explanation-18) + [▶ Lossy zip of iterators *](#-lossy-zip-of-iterators-)
- [▶ not knot!](#-not-knot) + [▶ Loop variables leaking out!](#-loop-variables-leaking-out)
- [💡 Explanation:](#-explanation-19) + [▶ Beware of default mutable arguments!](#-beware-of-default-mutable-arguments)
- [▶ Half triple-quoted strings](#-half-triple-quoted-strings) + [▶ Catching the Exceptions](#-catching-the-exceptions)
- [💡 Explanation:](#-explanation-20) + [▶ Same operands, different story!](#-same-operands-different-story)
- [▶ What's wrong with booleans?](#-whats-wrong-with-booleans) + [▶ Name resolution ignoring class scope](#-name-resolution-ignoring-class-scope)
- [💡 Explanation:](#-explanation-21) + [▶ Rounding like a banker *](#-rounding-like-a-banker-)
- [▶ Class attributes and instance attributes](#-class-attributes-and-instance-attributes) + [▶ Needles in a Haystack *](#-needles-in-a-haystack-)
- [💡 Explanation:](#-explanation-22) + [▶ Splitsies *](#-splitsies-)
- [▶ yielding None](#-yielding-none) + [▶ Wild imports *](#-wild-imports-)
- [💡 Explanation:](#-explanation-23) + [▶ All sorted? *](#-all-sorted-)
- [▶ Yielding from... return! \*](#-yielding-from-return-) + [▶ Midnight time doesn't exist?](#-midnight-time-doesnt-exist)
- [💡 Explanation:](#-explanation-24) * [Section: The Hidden treasures!](#section-the-hidden-treasures)
- [▶ Nan-reflexivity \*](#-nan-reflexivity-) + [▶ Okay Python, Can you make me fly?](#-okay-python-can-you-make-me-fly)
- [💡 Explanation:](#-explanation-25) + [▶ `goto`, but why?](#-goto-but-why)
- [▶ Mutating the immutable!](#-mutating-the-immutable) + [▶ Brace yourself!](#-brace-yourself)
- [💡 Explanation:](#-explanation-26) + [▶ Let's meet Friendly Language Uncle For Life](#-lets-meet-friendly-language-uncle-for-life)
- [▶ The disappearing variable from outer scope](#-the-disappearing-variable-from-outer-scope) + [▶ Even Python understands that love is complicated](#-even-python-understands-that-love-is-complicated)
- [💡 Explanation:](#-explanation-27) + [▶ Yes, it exists!](#-yes-it-exists)
- [▶ The mysterious key type conversion](#-the-mysterious-key-type-conversion) + [▶ Ellipsis *](#-ellipsis-)
- [💡 Explanation:](#-explanation-28) + [▶ Inpinity](#-inpinity)
- [▶ Let's see if you can guess this?](#-lets-see-if-you-can-guess-this) + [▶ Let's mangle](#-lets-mangle)
- [💡 Explanation:](#-explanation-29) * [Section: Appearances are deceptive!](#section-appearances-are-deceptive)
- [▶ Exceeds the limit for integer string conversion](#-exceeds-the-limit-for-integer-string-conversion) + [▶ Skipping lines?](#-skipping-lines)
- [💡 Explanation:](#-explanation-30) + [▶ Teleportation](#-teleportation)
- [Section: Slippery Slopes](#section-slippery-slopes) + [▶ Well, something is fishy...](#-well-something-is-fishy)
- [▶ Modifying a dictionary while iterating over it](#-modifying-a-dictionary-while-iterating-over-it) * [Section: Miscellaneous](#section-miscellaneous)
- [💡 Explanation:](#-explanation-31) + [▶ `+=` is faster](#--is-faster)
- [▶ Stubborn `del` operation](#-stubborn-del-operation) + [▶ Let's make a giant string!](#-lets-make-a-giant-string)
- [💡 Explanation:](#-explanation-32) + [▶ Slowing down `dict` lookups *](#-slowing-down-dict-lookups-)
- [▶ The out of scope variable](#-the-out-of-scope-variable) + [▶ Bloating instance `dict`s *](#-bloating-instance-dicts-)
- [💡 Explanation:](#-explanation-33) + [▶ Minor Ones *](#-minor-ones-)
- [▶ Deleting a list item while iterating](#-deleting-a-list-item-while-iterating)
- [💡 Explanation:](#-explanation-34)
- [▶ Lossy zip of iterators \*](#-lossy-zip-of-iterators-)
- [💡 Explanation:](#-explanation-35)
- [▶ Loop variables leaking out!](#-loop-variables-leaking-out)
- [💡 Explanation:](#-explanation-36)
- [▶ Beware of default mutable arguments!](#-beware-of-default-mutable-arguments)
- [💡 Explanation:](#-explanation-37)
- [▶ Catching the Exceptions](#-catching-the-exceptions)
- [💡 Explanation](#-explanation-38)
- [▶ Same operands, different story!](#-same-operands-different-story)
- [💡 Explanation:](#-explanation-39)
- [▶ Name resolution ignoring class scope](#-name-resolution-ignoring-class-scope)
- [💡 Explanation](#-explanation-40)
- [▶ Rounding like a banker \*](#-rounding-like-a-banker-)
- [💡 Explanation:](#-explanation-41)
- [▶ Needles in a Haystack \*](#-needles-in-a-haystack-)
- [💡 Explanation:](#-explanation-42)
- [▶ Splitsies \*](#-splitsies-)
- [💡 Explanation:](#-explanation-43)
- [▶ Wild imports \*](#-wild-imports-)
- [💡 Explanation:](#-explanation-44)
- [▶ All sorted? \*](#-all-sorted-)
- [💡 Explanation:](#-explanation-45)
- [▶ Midnight time doesn't exist?](#-midnight-time-doesnt-exist)
- [💡 Explanation:](#-explanation-46)
- [Section: The Hidden treasures!](#section-the-hidden-treasures)
- [▶ Okay Python, Can you make me fly?](#-okay-python-can-you-make-me-fly)
- [💡 Explanation:](#-explanation-47)
- [▶ `goto`, but why?](#-goto-but-why)
- [💡 Explanation:](#-explanation-48)
- [▶ Brace yourself!](#-brace-yourself)
- [💡 Explanation:](#-explanation-49)
- [▶ Let's meet Friendly Language Uncle For Life](#-lets-meet-friendly-language-uncle-for-life)
- [💡 Explanation:](#-explanation-50)
- [▶ Even Python understands that love is complicated](#-even-python-understands-that-love-is-complicated)
- [💡 Explanation:](#-explanation-51)
- [▶ Yes, it exists!](#-yes-it-exists)
- [💡 Explanation:](#-explanation-52)
- [▶ Ellipsis \*](#-ellipsis-)
- [💡 Explanation](#-explanation-53)
- [▶ Inpinity](#-inpinity)
- [💡 Explanation:](#-explanation-54)
- [▶ Let's mangle](#-lets-mangle)
- [💡 Explanation:](#-explanation-55)
- [Section: Appearances are deceptive!](#section-appearances-are-deceptive)
- [▶ Skipping lines?](#-skipping-lines)
- [💡 Explanation](#-explanation-56)
- [▶ Teleportation](#-teleportation)
- [💡 Explanation:](#-explanation-57)
- [▶ Well, something is fishy...](#-well-something-is-fishy)
- [💡 Explanation](#-explanation-58)
- [Section: Miscellaneous](#section-miscellaneous)
- [▶ `+=` is faster](#--is-faster)
- [💡 Explanation:](#-explanation-59)
- [▶ Let's make a giant string!](#-lets-make-a-giant-string)
- [💡 Explanation](#-explanation-60)
- [▶ Slowing down `dict` lookups \*](#-slowing-down-dict-lookups-)
- [💡 Explanation:](#-explanation-61)
- [▶ Bloating instance `dict`s \*](#-bloating-instance-dicts-)
- [💡 Explanation:](#-explanation-62)
- [▶ Minor Ones \*](#-minor-ones-)
- [Contributing](#contributing) - [Contributing](#contributing)
- [Acknowledgements](#acknowledgements) - [Acknowledgements](#acknowledgements)
- [Some nice Links!](#some-nice-links)
- [🎓 License](#-license) - [🎓 License](#-license)
- [Surprise your friends as well!](#surprise-your-friends-as-well) * [Surprise your friends as well!](#surprise-your-friends-as-well)
- [Need a pdf version?](#need-a-pdf-version) * [More content like this?](#more-content-like-this)
<!-- tocstop --> <!-- tocstop -->