Dealing with errors and exceptional situations is a common requirement in programming. You can either prevent errors before they happen or handle errors after they’ve happened. In general, you’ll have two coding styles matching these strategies: look before you leap (LBYL), and easier to ask forgiveness than permission (EAFP), respectively. In this tutorial, you’ll dive into the questions and considerations surrounding LBYL vs EAFP in Python. By learning about Python’s LBYL and EAFP coding styles, you’ll be able to decide […]

The first days of May 2022 were the last days of this year’s PyCon US event. Just before the PyCon conference, the Python Language Summit brought together Python core developers, triagers, and special guests. Some of those attendees were the very same people who shipped two important Python releases this month. The third Thursday of May marked Global Accessibility Awareness Day. This day aims to raise awareness of how to build inclusive digital products. Read on to dive into the […]

Installing your Python application’s dependencies can be surprisingly slow. Whether you’re running tests in CI, building a Docker image, or installing an application, downloading and installing dependencies can take a while. So how do you speed up installation with pip? In this article I’ll cover: Avoiding the slow path of installing from source. pip download speed, and the alternatives: Pipenv and Poetry. A useful pip option that can, sometimes, speed up installation significantly. Avoiding installs from source When you install […]

The Real Python Community Slack is an English-medium Python community with members located worldwide. It’s a welcoming group in which you’re free to discuss any questions you may have, celebrate your progress, or hang out with the community at the virtual watercooler. This guide is for you if you want to: Get the most out of the Real Python Slack community Navigate some of Slack’s most valuable features Get your questions answered by other Real Python members Learn the dos […]

Python is famous for coming with batteries included, and many sophisticated capabilities are available in the standard library. However, to unlock the full potential of the language, you should also take advantage of the community contributions at PyPI: the Python Packaging Index. PyPI, typically pronounced pie-pee-eye, is a repository containing several hundred thousand packages. These range from trivial Hello, World implementations to advanced deep learning libraries. In this tutorial, you’ll learn how to upload your own package to PyPI. Publishing […]

Sometimes your program is slow not because of your code, but because of where it’s running. If you have other processes competing for the same limited hardware resources, your code will run more slowly. Once you add virtualization into the mix, those competing processes might be invisible… but they’re still there. In this article we’ll cover: The hardware limits of CPUs’ cores and “hyperthreads”. How operating systems deal with multiple processes that want to use limited number of CPU cores. […]

In this tutorial, you’ll build a URL shortener with Python and FastAPI. URLs can be extremely long and not user-friendly. This is where a URL shortener can come in handy. A URL shortener reduces the number of characters in a URL, making it easier to read, remember, and share. By following this step-by-step project, you’ll build a URL shortener with Python and FastAPI. At the end of this tutorial, you’ll have a fully functional API-driven web app that creates shortened […]