Coding a Sudoku Solver in Python using recursion/backtracking

Learn how to code a Sudoku puzzle solver in Python! In this tutorial, I explain how recursion/backtracking work in order to solve a Sudoku puzzle input.

Code: https://github.com/kying18/sudoku

• sudoku_empty.py: empty template with optional helper functions and comments in the code for the steps
• sudoku.py: my solution from the video!

In this video, I go over the steps necessary to use recursion to solve the input. Basically, the steps we need to follow are: determine where the next guess should go, place a guess between 1-9, then attempt to solve by recursively calling the mutating function. If the function solves the puzzle, then we are done. Otherwise, we reset our guess and guess another number.

At the end, we’ve literally tried every single combination of numbers on the board, through the backtracking process, so if we haven’t reached a solution, then we know that our puzzle is unsolvable.

Of course, this is not a very “intelligent” solution in the sense that we have to try all the various combinations. There is probably a more optimized solution out there that can solve the problem in fewer steps. This is a good exercise to try! If you think your solution is good, you can make a pull request on github or just DM me your solution. I might include it in the github (with credits to you ofc).

Check out this wiki page for some more info about sudoku algorithms that are more intelligent than just backtracking: https://en.wikipedia.org/wiki/Sudoku_solving_algorithms

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top 30 Python Tips and Tricks for Beginners

Welcome to my Blog , In this article, you are going to learn the top 10 python tips and tricks.

1) swap two numbers.

2) Reversing a string in Python.

3) Create a single string from all the elements in list.

4) Chaining Of Comparison Operators.

5) Print The File Path Of Imported Modules.

6) Return Multiple Values From Functions.

7) Find The Most Frequent Value In A List.

8) Check The Memory Usage Of An Object.

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Lambda, Map, Filter functions in python

Welcome to my Blog, In this article, we will learn python lambda function, Map function, and filter function.

Lambda function in python: Lambda is a one line anonymous function and lambda takes any number of arguments but can only have one expression and python lambda syntax is

Syntax: x = lambda arguments : expression

Now i will show you some python lambda function examples:

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Using Black To Auto Format Your Python

Writing python code is one thing and writing the code in a good format is another thing. Most of the time especially junior coders/programmers focus on making sure the codes are working and forget to format their codes.

If you write a small program (with 1000 lines of codes) you could get away without formatting your code, but as programs get more and more complex, they get harder and harder to understand and at some point (around 15,000 lines of code), it becomes harder to understand the code that you yourself wrote.

The difference between working on well-formatted code and working on badly formatted code is like the difference between living in a palace and living in a dirty house.

Why formatting your python code is important?

#programming #python #python-programming #python-tutorials #python-tips #python-developers #code-quality #clean-code

How to find WiFi Passwords using Python 2021|Hack WiFi Passwords|Python Script to find WiFi Password

Hack Wifi Passwords easily..

https://youtu.be/7MwTqm_-9Us

 

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50+ Basic Python Code Examples

List, strings, score calculation and more…

1. How to print “Hello World” on Python?

2. How to print “Hello + Username” with the user’s name on Python?

3. How to add 2 numbers entered on Python?

4. How to find the Average of 2 Entered Numbers on Python?

5. How to calculate the Entered Visa and Final Grade Average on Python?

6. How to find the Average of 3 Written Grades entered on Python?

7. How to show the Class Pass Status (PASSED — FAILED) of the Student whose Written Average Has Been Entered on Python?

8. How to find out if the entered number is odd or even on Python?

9. How to find out if the entered number is Positive, Negative, or 0 on Python?

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