Learn some Python tools and tricks to avoid common mistakes.

Pythonic Style of Programming: Tips and Tricks

When you run code in Python, there’s a lot happening under the hood. This module sheds light on some of the lesser-known parts of Python.

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 this module 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

Conclusion

Challenge 2: Updating Outer Scope Values

Problem Statement