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GIL-Free CPython Proof of Concept, Type Hints Case Study, Using @property, and More

#495 – OCTOBER 19, 2021 VIEW IN BROWSER
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No-GIL Fork of CPython
This is a proof-of-concept implementation of CPython that supports multithreading without the global interpreter lock (GIL), from Facebook research. An overview of the design is described in the Python Multithreading without the GIL Google doc. Also see the related discussions on LWN and Hacker News.
GITHUB.COM/COLESBURY • Shared by Henry Schreiner

Why You Shouldn’t Invoke setup.py Directly
“The setuptools team no longer wants to be in the business of providing a command line interface and is actively working to become just a library for building packages. What you should do instead depends on your use case, but if you want some basic rules of thumb, there is a table in the summary section.”
PAUL GANSSLE

Data Elixir: Data Science Newsletter
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Where Does All the Effort Go? Looking at Python Core Developer Activity
“One of the tasks given me by the Python Software Foundation as part of the Developer in Residence job was to look at the state of CPython as an active software development project. What are people working on? Which standard libraries require most work? Who are the active experts behind which libraries?”
ŁUKASZ LANGA

Cool New Features in Python 3.10
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PyCascades 2022 CFP Closes on Sunday (Oct 24)
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Announcing PSF Fellow Members for Q3 2021
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Psycopg 3.0 Released
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PyPy 7.3.6 Released
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Articles & Tutorials


Tests Aren’t Enough: Case Study After Adding Type Hints to urllib3
“Since Python 3.5 was released in 2015 including PEP 484 and the typing module type hints have grown from a nice-to-have to an expectation for popular packages. To fulfill this expectation our team has committed to shipping type hints for the v2.0 milestone. What we didn’t realize is the amount of value we’d derive from this project in terms of code correctness.”
SETH MICHAEL LARSON

Welcoming the CPython Developer in Residence
Earlier this year, the Python Software Foundation announced the creation of the Developer in Residence role. The first Visionary Sponsors of the PSF have provided funding for this new role for one year. What development responsibilities does this job address? This week on the show, Łukasz Langa talks about becoming the first CPython Developer in Residence.
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Accelerate Your Python Apps With Apache Cassandra™ NoSQL. Register for an Astra DB Demo
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Python Assignment Expressions and Using the Walrus Operator
In this course, you’ll learn about assignment expressions and the walrus operator. The biggest change in Python 3.8 was the inclusion of the := operator, which you can use to assign variables in the middle of expressions. You’ll see several examples of how to take advantage of this new feature.
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A Roadmap to XML Parsers in Python
In this tutorial, you’ll learn what XML parsers are available in Python and how to pick the right parsing model for your specific use case. You’ll explore Python’s built-in parsers as well as major third-party libraries.
REAL PYTHON

How APT Does Its Fancy Progress Bar
“Today while running an apt full-upgrade I asked myself how apt does this nice progress bar stuck at the bottom line while still writing scrolling text.” Python example code included.
JULIEN PALARD

Configuration Is an API, Not an SDK
Guidelines for config management in general and for Python apps in particular. Why “Configuration is just another API of your app” might be a good philosophy to adopt.
HERNAN LOZANO • Shared by Hernan Lozano

Python’s property(): Add Managed Attributes to Your Classes
In this step-by-step tutorial, you’ll learn how to create managed attributes, also known as properties, using Python’s property() in your custom classes.
REAL PYTHON

Receive a $5 Donation to the OSS of Your Choice When You Deploy Your Free Scout APM Trial Today
Scout is performance monitoring designed to provide the data insights necessary for any dev to become a performance pro. Find and fix observability issues before your customers notice by connecting your error reporting and APM data on one platform.
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Pip vs Conda: A Comparison of Python’s Two Packaging Systems
“Python has two commonly used packaging systems, pip and Conda. Learn the differences between them so you can pick the right one for you.”
ITAMAR TURNER-TRAURING

Secure Password Handling in Python
Protect and secure your passwords and credentials in Python with help of these techniques and tips.
MARTIN HEINZ • Shared by Martin Heinz

Understanding np.where()
The NumPy where() function is like a vectorized switch that you can use to combine two arrays.
BEN COOK

Three Tools to Profile a Django App
KRACEKUMAR.COM

More Uses for functools.partial() in Django
ADAM JOHNSON


Projects & Code


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classyconf: Declarative and Extensible Library for Configuration & Code Separation
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📆🐍 Upcoming Python Events


⋅ Weekly Real Python Office Hours Q&A (Virtual) October 20, 2021

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⋅ Introduction to the Python Programming Language (In Persian) October 26, 2021

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⋅ Dominican Republic Python User Group October 26 to October 27, 2021

⋅ PyKla Monthly Meetup October 27, 2021

⋅ Python Meeting Düsseldorf October 27, 2021

⋅ Heidelberg Python Meetup October 27, 2021

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Happy Pythoning!
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Python Secures TIOBE #1 Spot, Guido on Python Performance, 3.10 Updates, and More

Tuesday, October 12, 2021

Beating C and Java, Python Becomes the #1 Most Popular Programming Language, Says TIOBE #494 – OCTOBER 12, 2021 VIEW IN BROWSER The PyCoder's Weekly Logo Beating C and Java, Python Becomes the #1

All Things Python 3.10, Proportional Fonts, Python Editors, and More

Tuesday, October 5, 2021

Python 3.10: Cool New Features for You to Try #493 – OCTOBER 5, 2021 VIEW IN BROWSER The PyCoder's Weekly Logo Python 3.10: Cool New Features for You to Try Explore some of the coolest and most

Python GIL Deep-Dive, Django 4.0 is Coming, Python as a Build Tool, and More

Tuesday, September 28, 2021

Python Behind the Scenes: The GIL and Its Effects on Python Multithreading #492 – SEPTEMBER 28, 2021 VIEW IN BROWSER The PyCoder's Weekly Logo Python Behind the Scenes: The GIL and Its Effects on

Structural Pattern Matching, Generator Expressions, Python Steps Forward, and More

Tuesday, September 21, 2021

Structural Pattern Matching in Python 3.10 #491 – SEPTEMBER 21, 2021 VIEW IN BROWSER The PyCoder's Weekly Logo Structural Pattern Matching in Python 3.10 “Python 3.10, which is due out in early

Practical PEP 8, Logging Best Practices, "async for", and More

Tuesday, September 14, 2021

Applying PEP 8 in Practice #490 – SEPTEMBER 14, 2021 VIEW IN BROWSER The PyCoder's Weekly Logo Applying PEP 8 in Practice “Two recent threads on the python-ideas mailing list have overlapped to a

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