serhii.net

Installed noisetorch, it complained about CAP_SYS_RESOURCE like the last time and I fixed it by installing polkit like the last time, didn’t work though.

Issue seems to be that by default Mint has the home partition mounted with nosetuid¹, confirmed by doing mount.

Fix was to put the binary in /opt, the prompt is the same but after entering the password it works and I see the expected interface.

Use-case - using limited mobile internet.

vnstat is nice. sudo apt install vnstat, service has to be started/enabled through systemctl as usual.

Logs traffic with 5-minute granularity, so for the first 5 minutes after install will say that there’s not enough information :)

vnstat -5 returns the last hours in 5-minute interval, -h/-d/-m is hourly/daily/monthly.

-i selects the interface (otherwise all existing non-zero ones will be shown).

Saw this in the python pandoc cookbook¹

holder[index:index+1] = split_home(elt)

Wow.

Never thought I could assign multiple elements to a slice!

pdbpp is a drop-in replacement for pdb, and I like it more than ipdb for some reason.

Installing it makes it the default one imported when importing pdb (incl. by pytest, python’s breakpoint() etc!)

Really nice tutorial: pdb++, a drop-in replacement for pdb (the Python debugger) | PythonRepo

Vanilla-pdb cheatcheet: Python Debugger Cheat Sheet - Kapeli

Features not present in pdb that I love:

• ll outputs the text of the current function
• sticky updates the function listing with each new line, giving a nice interactive visual feeling to the debugging process

pytest -s works to make it play nice with the stdouts generated by pdbpp.

In the context of reading a settings.ini from python’s decouple¹ config lib, this works as empty string

YAML_CONVERTER_PREFIX=

has to be cast to string though:

D_YAML_CONVERTER_PREFIX = config("YAML_CONVERTER_PREFIX", cast=str)

These don’t, these are strings containing two characters, "" and '' respectively.

YAML_CONVERTER_PREFIX=""
YAML_CONVERTER_PREFIX=''

Wooho!

files = list(input_dir.glob("*.md"))[: cs.limit]
if output_path.is_file() and ((l := len(files)) != 1):
    raise ValueError(f"Can't write {l} files to single file {output_dir}")

Had to use additional parentheses around the actual assignment. Without that, black fails in an interesting way:

error: cannot format smw_to_hugo/yaml_converter.py: cannot use --safe with this file; failed to parse source file.

Just discovered this! In vim, if I skip the pattern, it’ll take the one last searched for:

/mypattern
:s//newpattern/g

Had weird issues with kitty terminal output being wrong, lines in vim/nvim being in wrong places, usually because it thought the terminal was a different size than it really was (blamed it on nvim initally, but the problem happened in other complex CLI programs too, notably tig).

$TERMINFO wasn’t set, and the terminfo file was nowhere to be found. The package kitty-terminfo was installed though.

In any case, downloaded the terminfo file from the repo and set the env variable manually in zshrc, now it works:

export TERMINFO="$HOME/.config/kitty/xterm-kitty"

After for the nth time writing awkward code like

if limit is None: 
    limit = len(mylist)

decided to see if there’s a better way. Looked into the walrus operator etc,but decided to test what I get with None.

Well, mylist[:None] works! No errors, I’d guess I get a copy of it same as mylist[:].

Will save me hundreds of lines in the future!

Docu about slice¹ is terse, says it uses range(start,end,step) under the hood with start and step defaulting to None. But range doesn’t accept None for all arguments! TODO for later I guess.

Stumbled upon python-decouple · PyPI, which seems like a “better” dotenv (supports casting, defaults etc)

For example, this is a settings.ini in poetry project root:

[settings]
ECHO=True

I can overwrite these parameters like ECHO=False poetry run python myscript.py

Neat!