To get the most out of this book

All the software used in this book is open source, meaning you will not have to pay for any of it. If you do find it useful, you are encouraged to find ways to give back to these communities, either financially or by contributing to the code base directly. NumFOCUS sponsors many of the tools used; you can find more about them at their website: https://numfocus.org/.

If you are using the digital version of this book, we advise you to type the code yourself or access the code from the book's GitHub repository (a link is available in the next section). Doing so will help you avoid any potential errors related to the copying and pasting of code.