#492 – SEPTEMBER 28, 2021
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Python Behind the Scenes: The GIL and Its Effects on Python Multithreading
GIL stands for the Global Interpreter Lock, and its job is to make the CPython interpreter thread-safe. This post tells you more about non-obvious effects of the GIL. Along the way, you’ll see what the GIL really is, why it exists, how it works, and how it’s going to affect Python concurrency in the future.
VICTOR SKVORTSOV
The Django Template Language: Tags and Filters
Django templates use their own mini-language that’s inspired by Python. This tutorial covers Django template tags and filters, explaining how to compile and use templates. It covers conditional blocks, looping, and inheritance in tags as well as filters for strings and filters for lists.
REAL PYTHON
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New Testing Features in Django 4.0
Django 4.0 had its first alpha release last week and the final release should be out in December. It contains an abundance of new features, which you can check out in the release notes. This post looks at the changes to testing in a bit more depth.
ADAM JOHNSON
4 Things Tutorials Don’t Tell You About PyPI
“Although it’s well known PyPI is unforgiving for good reasons, the package publishing process is not as straightforward as the tutorials make it seem. I run into a few unexpected minor bumps none of the guides mention.”
PAOLOA AMOROSO
Discussions
Python Jobs
Senior Python Engineer @ Moody's AI & ML Center of Excellence (New York, NY, USA)
Senior Software Engineer (Washington D.C., USA)
Senior Backend Software Engineer (Anywhere)
Articles & Tutorials
Python as a Build Tool
“Normally, when starting a Java project (or any other programming project, really), you don’t want to reinvent the wheel. You go with the de-facto build system, folder structure, environment, etc. The ones that the rest of the world is using. Yet, both Skija and JWM are built using Python scripts instead of more traditional Ant/Maven/Gradle/SBT. Why? Let’s find out!”
NIKITA TONSKY
Measuring Your Python Learning Progress
Where are you along the path of learning Python? Do you feel like you’re making progress? What are ways you can put the learning path into a more precise focus? This week on the show, a discussion with Martin Breuss about his recent article “How Long Does It Take to Learn Python?”
REAL PYTHON podcast
What Is Pathlib?
The pathlib module was introduced in Python 3.4 and makes working with filesystem paths easier by implementing a Pythonic, OS-agnostic way to manipulate and interact with paths. In this quick video, Nafiul, developer advocate for PyCharm, shows how to use the library and some of its popular APIs.
JETBRAINS sponsor video
Rock, Paper, Scissors With Python: A Command Line Game
In this course, you’ll learn to program rock paper scissors in Python from scratch. You’ll learn how to take in user input, make the computer choose a random action, determine a winner, and split your code into functions.
REAL PYTHON course
Reverse Strings in Python: reversed(), Slicing, and More
In this step-by-step tutorial, you’ll learn how to reverse strings in Python by using available tools such as reversed() and slicing operations. You’ll also learn about a few useful ways to build reversed strings by hand.
REAL PYTHON
Understand Django: User File Use
Maybe your Django app needs to handle files from users like profile pictures. Accepting files from others is tricky to do safely. In this article, you’ll see the tools that the framework provides to manage files safely.
MATT LAYMAN • Shared by Matt Layman
Django REST Framework Views - APIViews
Django REST Framework (DRF) has its own flavor of views that inherit from Django’s View class. This article explores the most basic of the views: APIView. APIView is the base for every other DRF view.
ŠPELA GIACOMELLI • Shared by Špela Giacomelli
Why Does Black Insist on Reformatting My Entire Project?
Why Black recommends adopting it by reformatting your entire codebase in one go and refuses to do “region reformatting.” Thoughts from the creator for the popular Python auto-formatter.
ŁUKASZ LANGA
DataStax Astra DB – Built on Apache Cassandra. Get 80 Gigabytes of Storage Free Every Month
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Split, Merge and Rotate PDF Documents Using borb
Split, merge and rotate PDF documents using borb, the open-source pure Python PDF library.
JORIS SCHELLEKENS • Shared by Joris Schellekens
Type Check Your Django App
How to add gradual typing to your Django app, focusing on Django views and Django models.
KRACEKUMAR RAMARAJU • Shared by Kracekumar Ramaraju
Projects & Code
hist: Pythonic Notebook-Ready Histograms Built on boost-histogram
GITHUB.COM/SCIKIT-HEP • Shared by Henry Schreiner
boost-histogram: Powerful Histogram Objects for Python
GITHUB.COM/SCIKIT-HEP • Shared by Henry Schreiner
Events
Real Python Office Hours (Virtual)
September 29, 2021
REALPYTHON.COM
PyConTW 2021
October 2 to October 4, 2021
PYCON.ORG
Melbourne Python Users Group, Australia
October 4, 2021
J.MP
PyCon ZA 2021
October 7 to October 9, 2021
PYCON.ORG
Happy Pythoning!
This was PyCoder’s Weekly Issue #492.
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