Architecture Patterns with Python Review

Architecture Patterns with Python

Architecture Patterns with Python by Harry Percival and Bob Gregory

I learned about this book by watching Harry Percival's 2020 PyCon talk Stop Using Mocks (for a while). In the past, I was pretty enthusiastic about mocks, especially in Python because they, along with patching, let me test just about …

UI Horror: Login... Again

I use Office 365 with the web version of Outlook at work. At some point, I'll notice that the browser tab has changed appearance, and click on it to find that I've been logged out. No worries, there's a prompt right there for my password to renew my session. Soon …

eero Pro 6 First Impressions

I set up an eero Pro 6 mesh network in my house this past week. These are my first impressions of the system.


Earlier this year, my employer decided that the pandemic-motivated "work from home" policy would continue indefinitely for the engineering department. After moving a few PCs from …

Functions Returning True on Success

Many beginning programmers latch on to the idea of having functions return True if they succeed and False if they fail so that you have code like this:

if do_something():
    # It worked!
    logger.error("Something didn't work!")

For me, I think it was when I saw some …

Preserving Git Blame History when Refactoring

I have some big source files in a project I'm working on. Embarrassingly big files -- multiple thousands of lines long. Those files also have years of Git blame history associated with them, and not wanting to lose that history has deterred me from refactoring to break those files into more …

SQLAlchemy Cascade Delete: Clarity through Examples

Since there is overlapping "cascade delete" functionality supported by SQLAlchemy -- with the ORM handling some deletes and the database itself handling others -- it can be hard to know the right way to set it up. Here are some examples to help clarify how it all works.

Starting Example

Here we …

Review of "The Body: A Guide for Occupants"

Book Cover

Douglas Crockford, in JavaScript: The Good Parts said, “Computer programs are the most complex things that humans make.” As someone who builds software, that idea can make you feel pretty good about your intellectual place in the world, because even though I don't know how lots of software works, I …

When to Give Up - Retrying Failures

When we programmers find an aspect of software that fails intermittently, we sometimes follow the impulse to add retries with a Churchillian insistence that we will "Never give in — never, never, never, never"! But sometimes the right thing is to give up.

One might ask, why retry at all? Didn't …

My Best Side Project

After a few years working on it, I can say that the "magic mirror" I built with my son has been the best for-fun side project I've ever done. When I was describing the idea, my wife was hesitant about letting me hang it on the wall -- mostly due to …

My Favorite Podcasts 2019

After working at home for a couple of years, it was hard to get back in the car every morning to commute after changing jobs. I'm lucky that it isn't that far, but it still felt like a monumental waste of time to be stuck in traffic. Podcasts have redeemed …