Category archives: Snaking

Discussions of programming, particularly of programming Python

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Potions with Custom Effects

In Pycraft, I figured out the Potions-with-custom-effects, the problem being that Bukkit's PotionEffectType doesn't actually implement the keyed interface, but instead has its own .values() call, so needs a whole special handler. The code for creating potion with custom effects looks like:


await potion_of(
'night_vision',
"Gopher's Gruel",
{
'type': 'fast_digging',
'duration': 20 * 60 * ...

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Finally Got Potions (ItemMeta) and Signs (BlockState) working

So one of the long-standing requests from the boys has been that we have the ability to create potions from Pycraft's in-game REPL. Today I finally got that working, mostly because I finally decided that there was room for a reference pattern to make the whole thing easier.

By way of background, Pycraft was previously ...

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Creating some Pycraft Videos

Pycraft has remained relatively obscure. It lets you write (very close to) Python code in the minecraft chat window to perform magic that's written in Python code on the backend. I thought maybe a few demos showing what you can do with the code might serve to interest a few others in playing with it. ...

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Python Version Support Ideas

As a general rule, I don't like to just stop supporting Python releases just for the sake of deprecation. I try to be relatively wide in the set of Python's I'll support for my libraries, with my current general rule being 2.7, 3.6+ .

Why those? Well, 2.7 is still on RHEL/Centos for another year ...

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Cleaning up the PyOpenGL Demos

Spent a bit of my second-last-day-of-vacation cleaning up the PyOpenGL Demos so that they run with current Python 3.10, PyOpenGL, numpy and PIL and can be installed as a package rather than only being usable via a git checkout.

There were a few bits of bit-rot, mostly around ctypes no longer allowing you to raise ...

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Go Lang Impressions after 2 Months

So for work I've needed to learn GoLang, which I'd always before picked up, kicked the tires and said "meh" on. A few months now of working with it pretty-much-daily have upped the "meh" quite a bit. To be clear, I'd choose Go over raw C, but I'd likely pick modern C++ over Go.

Channels ...

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Django Field Rename Migrations and Test Cases

Is there some trick to running Django test cases when you've got a RenameField later in the migration-stack? I feel like this has to be some obvious thing I'm missing...

With a migration (say 0058_big_restructure.py) which does this:


migrations.RenameField(
model_name='rfsource',
old_name='source_name',
new_name='follow_source_name',
),

and a previous migration, (say 0006_long_ago_change_that_populates_some_other_field.py) which doesn't explicitly reference the source_name ...

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PycraftServer Plugin

So the boys (and their cousin) are both into Minecraft again, so I've been refining the Pycraft code quite a bit. We no longer use the RaspberryJuice plugin, but instead have a custom Bukkit plugin that does Java reflection/introspection to auto-generate the API. That lets us do a lot more, manipulate inventories, read and write ...

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Adding a Certificate Authority to Chrome Trust Store

So you have a corporate or project specific root of trust you need Chrome to recognise. How do you take your PEM certificate as you get from easy-rsa or the like and make it something that Chrome will accept? The answer is not particularly complex, but it really seems like this very-common process is not ...

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PyOpenGL Build Enhancements

Spent the evening getting the Python 3.9 build for PyOpenGL-accelerate running on Appveyor. In the end it was just knowing to add a tag "APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019" to the build-matrix for that one Python version so that it is built on the Python 3.9-compatible build-image. Will have to boot into Windows to test that ...

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