Python: modifying imported value
TL;DR: Python statement from module import obj creates a copy of the object in the importing scope. In other words, from module import obj is roughly equivalent to obj = __import__(‘module’).obj. […]
RabbitMQ: misleading error message on double [N]ack
Our RabbitMQ client written in Go failed with the following error message: rabbitmq | 2024-10-23 17:54:01.311544+00:00 [error] operation basic.ack caused a channel exception precondition_failed: unknown delivery tag {message_tag} Taken at […]
Python packages: what was deprecated when
Creation of Python packages underwent a few significant changes in the last 3-4 years. Here’s my note to self to remember what was changed/deprecated when: “Eggs” => “Wheel“ “Eggs” was […]
The Night of the Zombie Registrars
TL;DR Before transferring a new domain to a registrar, contact support, and make sure there are still live humans behind the robots. If there aren’t, RUN!!! My two domains have […]
Marshmallow-dataclass: eliminating nulls in the resulting JSON
When serializing a dataclass, by default marshmallow-dataclass emits nulls for all fields that have the value of None. This is not necessariy most of the time and pollutes the resulting […]
Turing Test Passed Successfully
Last night I was talking to something which could be a human or a robot, I could not tell. But that’s not necessarily a good thing: not only AI became […]
Python generator expression can be iterated only once
TL;DR Python generator expressions can be iterated over only once. I mentally mapped Python generator expressions to C# IEnumerables, which can be iterated over multiple times. In reality, Python generator […]
AOSU Doorbell Camera
My analog doorbell has died, so I am on the market for a doorbell camera. I would like to avoid storing my videos in the cloud, so it rules out […]
What is dead code?
What is dead code? Looks like it depends on who you ask. Some people think it’s unreachable code than never executes. Other people think that it’s redundant code that does […]
Python: serializing JSON into dataclasses with validation
TL;DR use marshmallow-dataclass. Serializing JSON into dataclasses with validation proved to be unexpectedly difficult. By “validation” here I mean type checking (this must be a valid integer), range checking (this […]