Delve into Python's hidden mechanisms and discover essential tools and tricks to avoid common mistakes. Gain insights into Python hacks and improve your programming skills effortlessly.

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When you run code in Python, there’s a lot happening under the hood. This course sheds light on some of the interesting parts of Python you might be unaware of. 

As you progress through it, you’ll learn some tools and tricks that every Python programmer should know to avoid common mistakes. You can think of the course as a “Python hacks” handbook. 

Python basics are a prerequisite, but this is a beginner-level course. Each lesson is independent and after the first chapter, you can pick up from any lesson and you’ll be able to follow along comfortably.

Python FTW: Under the Hood

This might seem trivial if you know how references work in Python.

>>> some_tuple = ("A", "tuple", "with", "values")
>>> another_tuple = ([1, 2], [3, 4], [5, 6])

>>> some_tuple[2] = "change this"
TypeError: 'tuple' object does not support item assignment
>>> another_tuple[2].append(1000) #This throws no error
>>> another_tuple
([1, 2], [3, 4], [5, 6, 1000])
>>> another_tuple[2] += [99, 999]
TypeError: 'tuple' object does not support item assignment
>>> another_tuple
([1, 2], [3, 4], [5, 6, 1000, 99, 999])

<h1> Explanation </h1>

* Quoting from [the official documentation](https://docs.python.org/3/reference/datamodel.html):

    > **Immutable sequences**:
         An object of an immutable sequence type cannot change once it is created. (If the object contains references to other objects, these other objects may be mutable and may be modified. However, the collection of objects directly referenced by an immutable object cannot change.)

* The `+=` operator changes the list in-place. The item assignment doesn't work, but when the exception occurs, the item has already been changed in-place.

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![](/api/collection/10370001/6322201797066752/page/6551937248919552/image/6386838353739776)

Introduction

Slippery Slopes

Strain Your Brain!

Appearances Are Deceptive!

The Hidden Treasures!

Miscellaneous

Contributions & Acknowledgements

Mutating the Immutable!