#122: Give Me Back My Monolith
Published Fri, Mar 22, 2019, recorded Wed, Mar 20, 2019
Sponsored by DigitalOcean: pythonbytes.fm/digitalocean
Brian #1: Combining and separating dictionaries
PEP 584 -- Add + and - operators to the built-in dict class.
- Steven D'Aprano
- Draft status, just created 1-March-2019
d1 + d2 would merge d2 into d1
- or on two lines
d = d1.copy() d.update(d2)
of note, (d1 + d2) != (d2 + d1)
- Currently no subtraction equivalent
- Guido’s preference of + over |
- Related, Why operators are useful - also by Guido
Michael #2: Why I Avoid Slack
- by Matthew Rocklin
- I avoid interacting on Slack, especially for technical conversations around open source software.
- Instead, I encourage colleagues to have technical and design conversations on GitHub, or some other system that is public, permanent, searchable, and cross-referenceable.
- Slack is fun but, internal real-time chat systems are, I think, bad for productivity generally, especially for public open source software maintenance.
- Prefer GitHub because I want to
- Engage collaborators that aren’t on our Slack
- Record the conversation in case participants change in the future.
- Serve the silent majority of users who search the web for answers to their questions or bugs.
- Encourage thoughtful discourse. Because GitHub is a permanent record it forces people to think more before they write.
- Cross reference issues. Slack is siloed. It doesn’t allow people to cross reference people or conversations across Slacks
Brian #3: Hunting for Memory Leaks in Python applications
- Wai Chee Yau
- Conquering memory leaks and spikes in Python ML products at Zendesk.
- A quick tutorial of some useful memory tools
matplotlibto visualize memory spikes.
muppyto heap dump at certain places in the code.
objgraphto help memory profiling with object lineage.
- Some tips when memory leak/spike hunting:
- strive for quick feedback
- run memory intensive tasks in separate processes
- debugger can add references to objects
- watch out for packages that can be leaky
Michael #4: Give Me Back My Monolith
- by Craig Kerstiens
- Feels like we’re starting to pass the peak of the hype cycle of microservices
- We’ve actually seen some migrations from micro-services back to a monolith.
- Here is a rundown of all the things that were simple that you now get to re-visit
- Setup went from intro chem to quantum mechanics
- Onboarding a new engineering, at least for an initial environment would be done in the first day. As we ventured into micro-services onboarding time skyrocketed
- So long for understanding our systems
- Back when we had monolithic apps if you had an error you had a clear stacktrace to see where it originated from and could jump right in and debug. Now we have a service that talks to another service, that queues something on a message bus, that another service processes, and then we have an error.
- If we can’t debug them, maybe we can test them
- All the trade-offs are for a good reason. Right?
Brian #5: Famous Laws Of Software Development
- Tim Sommer
- 13 “laws” of software development, including
- Hofstadter’s Law: “It always takes longer than you expect, even when you take into account Hofstadter's Law.”
- Conway’s Law: “Any piece of software reflects the organizational structure that produced it.”
- The Peter Principle: “In a hierarchy, every employee tends to rise to his level of incompetence.”
- Ninety-ninety rule: “The first 90% of the code takes 10% of the time. The remaining 10% takes the other 90% of the time”
Michael #6: Beer Garden Plugins
- A powerful plugin framework for converting your functions into composable, discoverable, production-ready services with minimal overhead.
- Beer Garden makes it easy to turn your functions into REST interfaces that are ready for production use, in a way that’s accessible to anyone that can write a function.
- Based on MongoDB, Rabbit MQ, & modern Python
- Nice docker-compose option too
- Firefox Send
- Ethical ads on Python Bytes (and Talk Python)
- T&C 69: The Pragmatic Programmer — Andy Hunt
- not up yet, but will be before this episode is released
From Derrick Chambers
“What do you call it when a python programmer refuses to implement custom objects? self deprivation! Sorry, that joke was really classless.”
via pyjokes: I had a problem so I thought I'd use Java. Now I have a