Daily Python: PyCoder’s Weekly: Issue #358 (March 5, 2019)

#358 – MARCH 5, 2019
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PEP 584: Adding + and - Operators to the Built-In Dict Class

This PEP suggests adding merge + and difference - operators to the built-in dict class. The merge operator will have the same relationship to the dict.update method as the list concatenation operator has to list.extend, with dict difference being defined analogously. I think this is a pretty cool feature suggestion. Related discussion here.
PYTHON.ORG

Refactoring Python Applications for Simplicity

In this step-by-step tutorial, you’ll learn how to refactor your Python application to be simpler and more maintainable and have fewer bugs. You’ll cover code metrics, refactoring tools, and common anti-patterns.
REAL PYTHON

Become a Python Guru With PyCharm

PyCharm is the Python IDE for Professional Developers by JetBrains providing a complete set of tools for productive Python, Web and scientific development. Be more productive and save time while PyCharm takes care of the routine.
JETBRAINS sponsor

Managing Elasticsearch in Django

A small tutorial on how to manage Elasticsearch efficiently in a Django project. It uses elasticsearch-dsl as an ORM and a custom management system similar to django-haystack (which uses outdated ES).
HARSH BHIMJYANI • Shared by Harsh Bhimjyani

pydis: A Redis Clone in Python 3 to Disprove Some Falsehoods About Performance

An experiment to disprove some of the falsehoods about performance and optimisation regarding software and interpreted languages in particular. In short, this is a Redis clone, written in < 250 lines of idiomatic Python code, providing a subset of Redis’ functionality for which there are official benchmarks. Pydis is ~60% as fast as the compiled C version of Redis, as measured in number of operations per second.
GITHUB.COM/BORAMALPER

Python Bytes Episode 119 Recorded at PyCascades in Seattle

Together with Trey Hunner and Eric Chou, I was a guest on Mike and Brian’s excellent Python Bytes podcast. We recorded this episode “live” and together in the same room at the PyCascades conference in Seattle.
PYTHON BYTES podcast

EditorConfig: Maintain Consistent Coding Styles Between Different Editors and IDEs

This is super handy if you’re switching between editors or if you want to make sure your team uses the same indentation settings no matter which editor each developer uses.
EDITORCONFIG.ORG

Discussions

Python Multiprocessing: Understanding Logic Behind `chunksize`

An amazing, thorough, readable answer on Stack Overflow about the multiprocessing module.
STACK OVERFLOW • Shared by Christian Long

Useful Python Tricks

“What are some cool uses for Python for maybe younger people or just people without office jobs in general?”
REDDIT

`from mylibrary import *` 😉

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Articles & Tutorials

Traditional Face Detection With Python

In this article on face detection with Python, you’ll learn about a historically important algorithm for object detection that can be successfully applied to finding the location of a human face within an image.
REAL PYTHON

How to Write a Python Web Framework—Part III

The third post of the series where you’ll be writing our own Python framework just like Flask and Django.
JAHONGIR RAHMONOV

Take ActiveState’s Dev Survey for a Chance to Win a Lego Star Wars TIE Fighter

We want to know your pain points building & programming open source languages. We’ve got 3 cool prizes too. Click to speed through this ~7min survey →
ACTIVESTATE sponsor

Python Quirks: Implicit Return

Python functions always have to return something, right? Well, it’s complicated…
PHILIP TRAUNER

Python in VS Code Adds a New Test Explorer With Auto-Discovery

Pretty cool: This release includes the ability to visualize, navigate and run unit tests through a visual test explorer. Supports unittest, pytest and nose.
DAN TAYLOR

Python Security Best Practices Cheat Sheet

Covers some best practices for securely using Python.
SNYK.IO

Bleach: Stepping Down as Maintainer

Bleach is a Python library for sanitizing and linkifying text from untrusted sources for safe usage in HTML. In this post the author explains why he’s stepping down as a maintainer for the library and gives a retrospective on OSS project maintenance.
WILL KAHN-GREENE

Contributing to Classiness (In Django)

Django’s contribute_to_class() is an undocumented part of the ORM’s internal API that allows you to attach to/hook into a model.
JAMES BENNETT

Understanding Python Slices

“Slices are both common and convenient ways to extract portions of Python data structures — usually with builtin objects, but also on your own. Once you get used to slices, you’ll see lots of uses for them, and wonder how you got along without them.”
REUVEN M. LERNER • Shared by Reuven M. Lerner

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Tuesday, March 5, 2019

PyCoder’s Weekly: Issue #358 (March 5, 2019)

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