Daily Python: PyCoder’s Weekly: Issue #418 (April 28, 2020)

#418 – APRIL 28, 2020
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The Final Python 2 Release Marks the End of an Era

The final version of Python 2 has been released. As the Python community looks forward to the new era, Ryan Donovan from the Stack Overflow Blog takes some time to reflect on the transition and points out that, while support for Python 2 from official channels may be gone, the language isn’t dead. In fact, there’s reason to believe it will live on for decades to come.
RYAN DONOVAN

New Features in Python 3.9 You Should Know About

Python 3.9 is scheduled for release on May 10, 2020, and it’s packed full of new goodies. Explore these new features in this overview by Martin Heinz, including new dict operators, updates to the math module, new string methods, a functools.ToplogicalSorter class, and more!
MARTIN HEINZ • Shared by Martin Heinz

Scout APM for Python

Check out Scout’s developer-friendly application performance monitoring solution for Python. Scout continually tracks down N+1 database queries, sources of memory bloat, performance abnormalities, and more. Get back to coding with Scout →
SCOUT APM sponsor

The Python `pickle` Module: How to Persist Objects in Python

In this tutorial, you’ll learn how you can use the Python pickle module to convert your objects into a stream of bytes that can be saved to a disk or sent over a network. You’ll also learn the security implications of using this process on objects from an untrusted source.
REAL PYTHON

Collecting Questions for a Steering Council Q&A

As part of PyCon US 2020, the Python Steering Council will record a Q&A. They are soliciting questions from the community, so here’s your chance to get your burning questions answered!
PYTHON.ORG

Structuring a Python Application (Common Layouts)

This course is a reference guide to common Python application layouts and project structures for command-line applications, web applications, and more.
REAL PYTHON course

Discussions

Dealing With Failure

It’s not that professional programmers never fail. They’ve just learned how to deal with failure and recover from it—most of the time, anyway. What coping mechanisms have you come up with?
REDDIT

I’m Committed to 1 Year of Coding in Python. What Goals Can I Set for Myself Along the Way?

Lots of great advice for new Python programmers in this thread!
REDDIT

Python Jobs

Articles & Tutorials

Numbers in Python

Quick quiz: how many numeric data types are there in Python? If you answered “two, duh” then you might be surprised to learn that there are actually four! In addition to int and float, the fractions and decimal standard library modules implement data types used to represent fraction and decimal numbers exactly. Learn about all of Python’s numeric data types, their strengths and weakness, and how to choose the right one in this short-but-informative article from Moshe Zadka.
MOSHE ZADKA

Building on Solid Ground: Ensuring Reproducible Docker Builds for Python

Docker is a popular tool for distributing applications bundled with their environments. It’s often sold as a cure to the “it worked on my machine” conundrum, but you’re not alone if you’ve found this to be a bit oversold. The issue isn’t with Docker, though. Chances are your images aren’t completely reproducible. In this tutorial, you’ll learn some best practices for creating reproducible Docker builds.
ITAMAR TURNER-TRAURING

How to Convert `.py` to `.exe`

You’ve just created a Python project, but how can you easily distribute it as a one-click file? Fortunately, there are Python utilities that help convert files to .exe. Check out ActiveState’s tutorial that steps you through how to create an executable for your Python script →
ACTIVESTATE sponsor

Working With Warnings in Python (Or: When Is an Exception Not an Exception?)

Imagine you’re maintaining an open-source Python package and you’re going to release a new version with breaking changes. You warn users about those changes in documentation and even blast the info on social media channels. But wouldn’t it be great if you could warn users right in their terminal as their using your tool? Well, with Python’s warnings module, you can! How are warnings different from Python exceptions? Learn how to send and filter warnings, and why you would want to do so.
RUEVEN LERNER

Best Practices for Working With Configuration in Python Applications

Users love being able to configure an application. But dealing with user configuration means parsing untrusted input, validating that input, and figuring out how to access it safely in all the layers of your applications. Python has a rich configuration ecosystem. Lots of articles focus on how to use various configuration formats in your Python programs but skip out on the finer details of how and when configuration should be validated. This tutorial fills in some of those gaps.
TOBIAS PFEIFFER

Introduction to Python Sets

Have you heard about Python’s set data type? A set is an unordered collection of distinct objects that support fast membership tests and can be used to remove duplicates from a sequence. Learn all about this handy data type in this beginner-friendly article from Mike Driscoll.
MIKE DRISCOLL

The Pandas DataFrame: Make Working With Data Delightful

In this tutorial, you’ll get started with Pandas DataFrames, which are powerful and widely used two-dimensional data structures. You’ll learn how to perform basic operations with data, handle missing values, work with time-series data, and visualize data from a Pandas DataFrame.
REAL PYTHON

Events

Montréal-Python Online Hackathon

May 1st to May 3rd, 2020
MEETUP.COM • Shared by Montréal-Python

Happy Pythoning!
This was PyCoder’s Weekly Issue #418.
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Tuesday, April 28, 2020

PyCoder’s Weekly: Issue #418 (April 28, 2020)

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