Build a Social Network With Django, Make Your Own Linter, Log Injections Attacks, and More

#506 – JANUARY 4, 2022

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Gem: Exploding String Alternatives
Here’s a Python gem: a small bit of Python that uses the power of the language and standard library well. It’s a function to list strings generated by a pattern with embedded alternatives. It takes an input string with brace-wrapped possibilities, and generates all the strings made from making choices among them: explode("{Alice,Bob} ate a {banana,donut}.")
NED BATCHELDER

Build a Social Network With Django – Part 1
In this four-part tutorial series, you’ll build a social network with Django to showcase in your portfolio. You’ll learn about relationships between Django models and how to use forms so that users can interact with your app. You’ll also make your site look good by using the Bulma CSS framework.
REAL PYTHON

Provision Your Cloud Infrastructure Using Python and Pulumi

What if you could use your existing programming knowledge to build, deploy, and manage cloud infrastructure using your favorite languages and tools? Pulumi is a cloud engineering platform that lets you write infrastructure as code in any programming language, on any cloud platform. Get started today →
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Learn Python ASTs, by Building Your Own Linter
A guide to Abstract Syntax Trees in Python. They form the basis of a lot of tools we take for granted, like linters, code formatters and syntax highlighting. With this article you’ll get to learn about ASTs by building your own linter from scratch.
TUSHAR SADHWANI • Shared by Tushar Sadhwani

urllib3 Raised $15,000 in 2021
SETH MICHAEL LARSON

Django Developers Survey 2021 Results
DJANGO SOFTWARE FOUNDATION

Discussions

Python vs C % (Modulo/Remainder) Operator Behavior
In Python the % operator returns a number with the same sign as the second argument. C doesn’t actually have a “modulo” operator but a “remainder” operator, according to the C spec. Read the Hacker News discussion after the tweet for a full explanation.
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Python Threads Scheduling Differences Between 3.10 and 3.9
“Unintended consequence of Mark Shannon’s change that refactors fast opcode dispatching […]”
STACK OVERFLOW

Python Jobs

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Articles & Tutorials

Is Your Python Code Vulnerable to Log Injection?
Following the news on log4j lately, you may wonder if Python’s logging library is safe. After all, there is a potential for injection attacks where string formatting meets user input. Thankfully, Python’s logging isn’t vulnerable to remote code execution. Nonetheless it is still important to be careful with untrusted data. This article describes some common pitfalls, and how logging f-strings could—in certain situations—leave you vulnerable to other types of attacks.
ARIE BOVENBERG • Shared by Arie Bovenberg

2021 Real Python Articles Wrap Up
It’s been a year of change at Real Python! The Real Python team has written, edited, curated, illustrated, and produced a mountain of Python articles this year. We also added many new members to the team, updated the site’s features, and created new styles of tutorials and projects.
REAL PYTHON podcast

Application Performance Monitoring, Built for Developers by Developers

Scout is an application performance monitoring tool designed to help Python developers find and fix performance issues quickly. With unlimited seats and applications, users of Scout’s APM tool find that anyone can be a performance expert. Click to sign up for your free 14-day trial today →
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Python Type Hints: How to Handle Optional Imports
This post is not about importing typing.Optional, but instead imports that are themselves optional. Libraries often have optional dependencies, and the code should work whether or not the import is there.
ADAM JOHNSON

Reading Tracebacks in Python
When exceptions go unhandled, Python prints a traceback. Tracebacks are read from the bottom upward. The last line describes what happened and lines above describe where it happened.
TREY HUNNER

Three Problems With a Tool
A discussion of three problems with Python: “packaging, fractured tooling, crufty standard library”
MOSHE ZADKA

What’s Your Favorite Programming Language?
Take the Developer Nation survey, share your views and make an impact on the developer ecosystem. Plus, you get a chance to win cool prizes, licenses, gaming accessories, vouchers and many more.
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Pointers/References in Python
DENNIS YURICHEV

Unravelling elif/else From if Statements
BRETT CANNON

Unravelling finally and else From try Statements
BRETT CANNON

Using Borb to Create Ebooks From Project Gutenberg
JORIS SCHELLEKENS • Shared by Joris Schellekens

Projects & Code

Brought to you by Real Python for Teamssponsor
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numbers-parser: Python Module for Parsing Apple Numbers Spreadsheets
GITHUB.COM/MASACCIO

NetworkX: Network Analysis in Python
NETWORKX.ORG

python-minifier: Transform Python Source Code Into It’s Most Compact Representation
GITHUB.COM/DFLOOK • Shared by Python Bytes FM

emacspy: Program Emacs in Python Instead of ELisp
GITHUB.COM/ZIELMICHA

fastwsgi: Ultra Fast WSGI Server for Python 3
GITHUB.COM/JAMESROBERTS

django-browser-reload: Automatically Reload Your Browser in Development
ADAM JOHNSON

📆🐍 Upcoming Python Events

⋅ Weekly Real Python Office Hours Q&A (Virtual) January 5, 2021

⋅ Canberra Python Meetup January 6, 2022

⋅ Sydney Python User Group (SyPy) January 6, 2022

⋅ Reunión Python Valencia January 6, 2022

⋅ Python Miami January 8 to January 9, 2022

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⋅ Edmonton Python User Group January 10, 2022

Happy Pythoning!
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Build a Social Network With Django, Make Your Own Linter, Log Injections Attacks, and More

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The "zipimport" Module, Fast Async HTTP Requests, Versioning, PEP 669, and More

Python Exceptions, Poetry, Steering Council Elections, and More

Advent of Python, Error Message Styles, Django 4.0, and More

Python Argument Defaults, Data Viz With Dash, Rats in VR, and More

Python News Roundup, Web Performance Benchmarking, Static Duck Typing, and More

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