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Python FTW: Under the Hood

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Introduction

Slippery Slopes

Stubborn del Operation

The Out of Scope Variable

Deleting a List Item While Iterating

A Tic-tac-toe Where X Wins in the First Attempt!

Lossy Zip of Iterators

Loop Variables Leaking Out!

Modifying the Dictionary While Iterating Over It

Challenge 1: Sudoku

Solution Review: Sudoku

Name Resolution Ignoring Class Scope

Beware of Default Mutable Arguments!

Catching the Exceptions

Same Operands, Different Story!

Can I Call You Later?

What's Wrong With Booleans?

Class Attributes and Instance Attributes

Midnight Doesn't Exist?

Needles in a Haystack

More Needles in the Haystack

Challenge 2: Updating Outer Scope Values

Solution Review: Updating Outer Scope Values

Challenge 3: Updating Outer Scope Values Again

Solution Review: Updating Outer Scope Values Again

Strain Your Brain!

First Things First!Strings Can Be Tricky Sometimes Be Careful With Chained Operations How Not to Use the "is" Operator Hash Brownies Deep Down, We're All the Same Disorder Within Order Keep Trying...For What?Quick Quiz!Evaluation Time Discrepancy 'is not... ' Is Not 'is (not ...)'The Chicken and Egg Problem Subclass Relationships All-true-ation The Surprising Comma Strings and the Backslashes Not Knot!Half Triple-quoted Strings Quick Quiz!The Mysterious Key Type Conversion Non-Reflexive Class Method Yielding None Yielding From...Return!Nan-reflexivity Mutating the Immutable!The Disappearing Variable From Outer Scope Let's See If You Can Guess This?Quick Quiz!Quick Recap

Appearances Are Deceptive!

Skipping Lines?Teleportation Well, Something Is Fishy...Quick Recap

The Hidden Treasures!

Okay Python, Can You Make Me Fly?'goto', but Why?Brace Yourself!Let's Meet Friendly Language Uncle for Life Even Python Understands That Love Is Complicated Yes, It Exists!Ellipsis Inpinity Quick Quiz!Quick Recap

Miscellaneous

'+=' Is Faster Let's Make a Giant String!Slowing Down dict Lookups Bloating Instance dicts Minor Ones More of These This is the End Quick Quiz!Quick Recap

Conclusion

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Challenge 3: Updating Outer Scope Values Again

Challenge 3: Updating Outer Scope Values Again

Time for another coding challenge.

Problem statement

This problem is a variation of the previous problem statement. This time, ...