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

Let's look at another coding challenge.

<h2> Problem Statement </h2>

You must implement the `update_var()` function that takes in a `value` as  parameter, and updates the value of the `var` variable in the outer scope to the one supplied as a parameter. Return the updated `var` at the end. If `var` doesn't exist in the outer scope, your function should create it.

<h3> Sample input #1 </h3>

```py
var = 5

print(update_var(7))
```

<h3> Sample output #1 </h3>

```py
7
```

</br>

<h3> Sample input #2 </h3>

```py
# Assuming var doesn't exist
# var = 5

print(update_var(8))
```

<h3> Sample output #2 </h3>

```py
8
```

</br>
<h2>Coding challenge</h2>

Introduction

Slippery Slopes

Strain Your Brain!

Appearances Are Deceptive!

The Hidden Treasures!

Miscellaneous

Contributions & Acknowledgements

Challenge 2: Updating Outer Scope Values