#752 – SEPTEMBER 15, 2026 View in Browser » Sets and Dictionaries Can Have Quadratic-Time Performance A rough first approximation is that a dict has O(1) performance, but that only holds true for smaller containers. This article explores the performance limits of sets and dictionaries. DANIEL LEMIRE Stop Writing Edge Case Tests. Use Hypothesis Instead Introduction to property-based testing in Python with Hypothesis. Move from ‘what input should I test?’ to ‘what invariant should always hold?’ PEYTON GREEN • Shared by Anonymous Tired of Getting Blocked While Scraping the Web? ScrapingBee handles proxies, browsers, anti-bot systems, and retries so you can focus on your data. Get clean Markdown, JSON, or HTML from the web with up to a 99,9% success rate. ScrapingBee is SOC 2 Type II and GDPR compliant, and trusted by 4,000+ developers. Try ScrapingBee With 1,000 Free Credits SCRAPINGBEE sponsor Python 3.15 Preview: Lazy Imports Learn how Python 3.15 lazy imports work, how deferring heavy modules cuts your app’s startup time, and which imports still have to stay eager. REAL PYTHON Quiz: Python 3.15 Preview: Lazy Imports REAL PYTHON Call for Volunteers: Django Fundraising Working Group DJANGO SOFTWARE FOUNDATION PyPI Incident Report: File Hosting Errors PYPI.ORG Articles & Tutorials Nifty Django Feature: Q() Objects Django’s ORM includes the filter() method for returning a subset of rows in the database. Anything you can do with filter() you can do with a Q() object, which encapsulates the filter’s arguments. Since it is an object you can dynamically create and manage filters in your code. TIM SCHILLING Profile on Guido van Rossum The BBN Times has done a profile piece on Python’s creator Guido van Rossum. It covers his background, the creation of Python, and how he helped shepherd the language to its current state. FELIX YIM Making a Python Interpreter in 1024 Bytes Austin challenged himself to make a tiny subset of Python in C. It isn’t quite Python, but bares a resemblance and with a little code golf he built something quite small. AUSTIN Z. HENLEY Reading __dict__ Once Deoptimizes Attribute Access The usual explanation for why hoisting attributes out of a loop is faster has been wrong since CPython 3.11. Read about what more recent interpreters do. TIMOFEI IVANKOV • Shared by Timofei Ivankov An Effective Python Development Environment Choose a Python development environment that helps you get coding. Find tutorials and courses on editors, uv, virtual environments, and useful tools. REAL PYTHON Quiz: An Effective Python Environment REAL PYTHON How Hard Is It to Find a Remote Python Data Job? Piotr analyzed 88,975 Hacker News job posts from 2012 to 2026. The board shrank, remote work peaked, pay became clearer, and senior roles took over. PIOTR PŁOŃSKI Python Timer Functions Learn how to time your Python code with the time module, then build a reusable Timer class that works as a context manager. REAL PYTHON course Quiz: Python Timer Functions REAL PYTHON Prototyping a New CLI for Wagtail Wagtail 8 introduced a new API which has allowed devs to create a command line tool for interacting with a Wagtail CMS. THIBAUD COLAS Teaching NumPy’s ufuncs New Tricks Iason recently did an internship working on NumPy internals. This post talks about what he accomplished. IASON KROMMYDAS Projects & Code django-ox: Database Based Django Task Backend GITHUB.COM/OXPULL import-linter: Define and Enforce Rules for Imports GITHUB.COM/SEDDONYM Plotext 6: Plot Data, Images and Video in the Terminal GITHUB.COM/PICCOLOMO • Shared by Savino Piccolomo deployproof: AST Mutation Testing & Credential Scanning GITHUB.COM/SVSPRAVEEN dbmask: Discover & Mask Sensitive Data in Databases GITHUB.COM/SEALANDSEACAT • Shared by Siyuan Feng Events Weekly Real Python Office Hours Q&A (Virtual) September 16, 2026 REALPYTHON.COM PyCon Cameroon 2026 September 17 to September 20, 2026 PYTHONCAMEROON.ORG PyData Bristol Meetup September 17, 2026 MEETUP.COM Python Leiden User Group September 17, 2026 PYTHONLEIDEN.NL PyLadies Dublin September 17, 2026 PYLADIES.COM Happy Pythoning!This was PyCoder’s Weekly Issue #752.View in Browser » [ Subscribe to 🐍 PyCoder’s Weekly 💌 – Get the best Python news, articles, and tutorials delivered to your inbox once a week >> Click here to learn more ]