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 get on with the first coding challenge.

<h2> Problem statement </h2>

The problem has two tasks:

1. First, you must initialize a $9 \times 9$ grid representing a Sudoku board with all zeros.
2. Second, you must implement the `assign()` function, which takes the following parameters:
   - `grid`: A list of lists.
   - `row`: An integer indicating a row on the grid.
   - `col`: An integer indicating a column on the grid.
   - `value`: Value be assigned.

This function should assign `value` to the cell identified by `row` and `col` in the `grid`. Make sure that it won’t alter any other values. The function should return an altered grid at the end.

<h3> Sample input </h3> 

```py
# Demonstrating a 3x3 grid, a 9x9 sudoku
# will also have similar inputs based on the dimensions
grid = [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
row = 1
col = 0
value = 9
```

<h3> Sample output </h3>

```py
# Output for the assign method for the above sample input
[[0, 0, 0], [9, 0, 0], [0, 0, 0]]
```

Introduction

Slippery Slopes

Strain Your Brain!

Appearances Are Deceptive!

The Hidden Treasures!

Miscellaneous

Contributions & Acknowledgements

Challenge 1: Sudoku

Problem statement