#427 – JUNE 30, 2020
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PEP 622: Structural Pattern Matching
This PEP proposes adding pattern matching—a sort of enhanced switch statement—to the Python language. Read the PEP at the link above and follow the discussion on Reddit.
PYTHON.ORG
Clinging to Memory: How Python Function Calls Can Increase Your Memory Usage
One of the advantages Python has over a language like C is that you don’t have to worry about how memeory is freed up during program execution. But sometimes Python’s memory management doesn’t work the way you’d expect.
ITAMAR TURNER-TRAURING
Launch Your Data Science Career With Springboard
Learn foundational skills in Python programming and statistics. With an expert data science mentor in your corner, in just 4-6 weeks, you’ll be able to use Python to complete real-world coding exercises and be prepared to take the Data Science Career Track – complete with a job guarantee →
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Python’s reduce(): From Functional to Pythonic Style
In this step-by-step tutorial, you’ll learn how Python’s reduce() works and how to use it effectively in your programs. You’ll also learn some more modern, efficient, and Pythonic ways to gently replace reduce() in your programs.
REAL PYTHON
What Is the Core of the Python Programming Language?
What makes Python… Python? Is it the language semantics? A set of features? What could you strip away and still have something you’d call Python? Everyone needs a little programming language existentialism now and then.
BRETT CANNON
Python Pattern Matching: Guards and Or-Patterns Might Not Interact in the Way You Expect
There’s an implementation of PEP 622 that you can try out here. But it has some potentially confusing effects.
NICK ROBERTS
Boston Dynamics Now Sells a Robot Dog to the Public, And You Can Program It With Python
It only took 28 year, but now you can have your very own robot dog. If you can stomach the price tag, that is. But hey, it’s got a Python SDK!
RON AMADEO
How to Trick a Neural Network in Python 3
Is that a corgi or a goldfish?
ALVIN WAN
Discussions
What Is the Purpose of Floating Point Index in Pandas?
Considering issues like floating-point representation error, is it ever a good idea to use a float as an index?
STACK OVERFLOW
Why Is math.sqrt Massively Slower Than Exponentiation?
Is it, though? The square root of 2 might not be a good value for timing comparisons.
STACK OVERFLOW
Python Jobs
Senior Python Engineer (Remote)
Quantitative Analyst (Washington, DC)
Python Developer (Remote)
Senior Python / Django Developer (Philadelphia, PA, USA)
Articles & Tutorials
The Python heapq Module: Using Heaps and Priority Queues
Explore the heap and priority queue data structures. You’ll learn what kinds of problems heaps and priority queues are useful for and how you can use the Python heapq module to solve them.
REAL PYTHON
Speeding Up Function Calls With Just One Line in Python
The lru_cache decorator allows you to take advantage of memoization to optimize function calls.
HACKEREGG.GITHUB.IO
The Cloud Python Developers Love
DigitalOcean is the cloud provider that makes it easy for developers to deploy and scale their applications. From Flask and Django apps to JupyterHub Notebook servers, DigitalOcean enables Python developers to focus their energy on creating software →
DIGITALOCEAN sponsor
Unicode in Python: Working With Character Encodings
In this course, you’ll get a Python-centric introduction to character encodings and Unicode. Handling character encodings and numbering systems can at times seem painful and complicated, but this guide is here to help with easy-to-follow Python examples.
REAL PYTHON
PEP 620: Hide Implementation Details From the C API
Author Victor Stinner argues that Python’s C API is too close to the CPython implementation, which limits available optimizations and hinders the addition of new features. PEP 622 proposes hiding implementation details from the C API.
PYTHON.ORG
Python Regular Expressions, Views vs Copies in Pandas, and More
Have you wanted to learn Regular Expressions in Python, but don’t know where to start? Have you stumbled into the dreaded pink SettingWithCopyWarning in Pandas? Then check out this episode of the Real Python Podcast.
REAL PYTHON podcast
Testing Python Code That Makes HTTP Requests
The Dependency Inversion Principle helps you design code that is more extensible and easier to test. You can use it to test code that makes HTTP requests without using mocks.
ROMAN TOMJAK
Red Hat Enterprise Linux 8.2 Brings Faster Python 3.8 Run Speeds
Red Hat explains how they compiled CPython with GCC’s -fno-semantic-interposition flag to get run time speed improvements up to 30% faster than normal.
TOMAS OROSAVA
Mutable Defaults: Contrarian View on Mutable Default Arguments
Should you use mutable objects for default function arguments? Conventional wisdom says no, but has the risk been overstated?
A. COADY opinion
Street Lanes Finder: Detecting Street Lanes for Self-Driving Cars [2019)
Learn how to use OpenCV to detect street lanes in an image of a road.
GREG SURMA
Projects & Code
TextAttack: A Python Framework for Adversarial Attacks, Data Augmentation, and Model Training in NLP
Events
FlaskCon (Online)
July 4 to July 6, 2020
FLASKCON.COM
SciPy 2020 (Online)
July 6 to July 13, 2020
SCIPY.ORG
Happy Pythoning!
This was PyCoder’s Weekly Issue #427.
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