#222 Autocomplete with type annotations for AWS and boto3
Sponsored by Linode! pythonbytes.fm/linode
Special guest: Greg Herrera
YouTube live stream for viewers: Watch on YouTube
Michael #1: boto type annotations
* via Michael Lerner
* boto3's services are created at runtime
* IDEs aren't able to index its code in order to provide code completion or infer the type of these services or of the objects created by them.
* Type systems cannot verify them
* Even if it was able to do so, clients and service resources are created using a service agnostic factory method and are only identified by a string argument of that method.
* boto3_type_annotations defines stand in classes for the clients, service resources, paginators, and waiters provided by boto3's services.
Example with “bare” boto3:
Example with annotated boto3:
Brian #2: How to have your code reviewer appreciate you
* By Michael Lynch
* Suggested by Miłosz Bednarzak
* Actual title “How to Make Your Code Reviewer Fall in Love with You”
* but 🤮
* even has the words “your reviewer will literally fall in love with you.”
* literally → figuratively, please
* Topic is important though, here are some good tips:
* Review your own code first
* “Don’t just check for mistakes — imagine reading the code for the first time. What might confuse you?”
* Write a clear change list description
* “A good change list description explains what the change achieves, at a high level, and why you’re making this change.”
* Narrowly scope changes
* Separate functional and non-functional changes
* This is tough, even for me, but important.
* Need to fix something, and the formatting is a nightmare and you feel you must blacken it. Do those things in two separate merge requests.
* Break up large change lists
* A ton to write about. Maybe it deserves 2-3 merges instead of 1.
* Respond graciously to critiques
* It can feel like a personal attack, but hopefully it’s not.
* Responding defensively will only make things works.
Greg #3: REPODASH - Quality Metrics for Github repositories
* by Laurence Molloy
* Do you maintain a project codebase on Github?
* Would you like to be able to show the maturity of your project at a glance?
* Walk through the metrics available
* Use-case
Michael #4: Extra, extra, extra, extra, hear all about it
* Python 3 Float Security Bug
* Building Python 3 from source now :-/ It’s still Python 3.8.5 on Ubuntu with the kernel patch just today! (Linux 5.4.0-66 / Ubuntu 20.04.2)
* Finally, I’m Dockering on my M1 mac via:
* docker context create remotedocker --docker "host=ssh://user@server"
* docker context use remotedocker
*
docker run -it ubuntu:latest bash now works as usual but remotely!
*
Why I keep complaining about merge thing on dependabot. Why!?! ;)
*
Anthony Shaw wrote a bot to help alleviate this a bit. More on that later.
Brian #5: testcontainers-python
* Suggested by Josh Peak
* Why mock a database? Spin up a live one in a docker container.
* “Python port for testcontainers-java that allows using docker containers for functional and integration testing. Testcontainers-python provides capabilities to spin up docker containers (such as a database, Selenium web browser, or any other container) for testing.” import sqlalchemy from testcontainers.mysql import MySqlContainer with MySqlContainer('mysql:5.7.32') as mysql: engine = sqlalchemy.create_engine(mysql.get_connection_url()) version, = engine.execute("select version()").fetchone() print(version) # 5.7.32
* The snippet above will spin up a MySql database in a container. The get_connection_url() convenience method returns a sqlalchemy compatible url we use to connect to the database and retrieve the database version.
Greg #6: The Python Ecosystem is relentlessly improving price-performance every day
* Python is reaching top-of-mind for more and more business decision-makers because their technology teams are delivering solutions to the business with unprecedented price-performance.
* The business impact keeps getting better and better.
* What seems like heavy adoption throughout the economy is still a relatively small-inroad compared to what we’ll see in the future. It’s like water rapidly collecting behind a weak dam.
* It’s an exciting time to be in the Python world!
Extras:
Brian:
* Firefox 86 enhances cookie protection
* sites can save cookies. but can’t share between sites.
* Firefox maintains separate cookie storage for each site.
* Momentary exceptions allowed for some non-tracking cross-site cookie uses, such as popular third party login providers.
Joke:
56 Funny Code Comments That People Actually Wrote: These are actually in a code base somewhere (a sampling): /* * Dear Maintainer * * Once you are done trying to ‘optimize’ this routine, * and you have realized what a terrible mistake that was, * please increment the following counter as a warning * to the next guy. * * total_hours_wasted_here = 73 */ // sometimes I believe compiler ignores all my comments // drunk, fix later // Magic. Do not touch. /*** Always returns true ***/ public boolean isAvailable() { return false; }