serhii.net

qutebrowser crashing

Yet another time qtbrowser started crashing, yet another time fixed it by removing state and sessions from ~/.local/share/qutebrowser/. I blame me messing with qt versions last week.

ag

Somehow magically I don’t have to escape anything in the regexes when using it!

ag "(VISION_|short)" *

passing empty parameters to python argparse / cli?

python - Passing empty string to argparse - Stack Overflow:

python test.py --mode=

I’ve been using args a la -w is, but -w=is also works, and therefore python3 myprogram.py -w -another=opt is perfectly valid! Python parses it as empty string (that casts to False).

fc linux meaning

TIL fc stands for “fix command”!

vim s/ replacing stuff

Discovered that if you just want to remove something, %s/from works (without the second // part at all)

pycharm optimize imports

Auto import—PyCharm

python argparse

Seems the best current default way to do cli options! Docs tutorial is as accessible as usual: Argparse Tutorial — Python 3.9.1 documentation

parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter) # show default args in help
parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter) # allow newlines in help text
parser.add_argument("-lp", "--localpath", help="Local path. \n %(default)s", default=local_path) # add default text in help text manually

Python shadowing modules

When creating argparse.py, don’t be surprised if you can’t use argparse from import argparse. ¹

Python to read, TODO

Nice article: PyFormat: Using % and .format() for great good!

ag as grep alternative for code

I should make an effort to learn it and use it. ag -G "component.*yaml" regex - searches for regex inside all files whose path matches the regex after -G

ag --python "myregex" automatically looks for it in all python files, and really nicely outputs matches!

vim delete lines not containing a pattern

g!/pattern/d, as opposed to the usual g without exclamation mark.

Using less to copy cli stuff with weird linebreaks

If command returns output with newline breaks that are ignored when copypasting directly, using command | less seems to make it work - I can copypaste from there without problems.

Change volume of bluetooth headphones via cli / pactl

I wasn’t able to do it the usual amixer way, because:

You are running Pulseaudio, which uses ALSA to drive soundcards, but which connects to Bluetooth speakers without involving ALSA. When you set ALSA volumes with amixer, Pulseaudio notices and corrects the source/sink volumes[…] ¹

Command to do it directly through pulseaudio is: pactl set-sink-volume name_of_bluetooth_speaker +3%

Added this to ~/.config/i3/config:

bindsym Mod1+r exec  pactl set-sink-volume bluez_sink.60_AB_D2_43_E9_C5.a2dp_sink +5%
bindsym Mod1+c exec  pactl set-sink-volume bluez_sink.60_AB_D2_43_E9_C5.a2dp_sink -5%

Nomacs picture viewer remove animations + frameless

• Changed transition time to 0 in Settings -> Display -> Slideshow
• <F10> leaves only the current picture (‘frameless’), a la scrot; Though in this mode drag-n-drop doesn’t work!

zsh text colors list

Found this when autocompleting something else:

(12:36:26/10136)~/ $ which spectrum_ls
spectrum_ls () {
	for code in {000..255}
	do
		print -P -- "$code: %{$FG[$code]%}$ZSH_SPECTRUM_TEXT%{$reset_color%}"
	done
}

Returns 255 lines with 255 colors, they look neat:

To read - matplotlib

TODO: The Many Ways To Call Axes In Matplotlib | by Jun | Towards Data Science And in general

Deutsch

das wasserzeichen - Watermark! (Heard at work) die dringlichkeit - urgency. “Besondere Dringlichkeit”. Verschiedene Dringlichkeiten. (heard at work)

Bluetooth / Linux

blueman is a nice semi-gui suite for everything. bluetoothctl is an interactive cli.

Linux - remove noise from microphone with Noisetorch

lawl/NoiseTorch: Real-time microphone noise suppression on Linux. - creates virtual devices that are the same as inpucts, but filter the noise. Works really well for me! (Single binary). Works also for filtering voice in outputs! Listening to songs through it is weird.

taskwarrior zsh sprint env variable

Changed date format from %+V to just %V, which gives a sprint like 01 instead of 1 (which in turn removes the need for sprint.is:1 filtering in taskwarrior, now sprint:01 is a unique identifier)

~/.zshrc:

export SPRINT=$(date +%V)

matplotlib pyplot make certain color transparent

For this, a subset has to become bad values, and a cmap has to set what to do with them.

my_cmap = copy.copy(plt.cm.get_cmap('gray')) # get a copy of the gray color map
my_cmap.set_bad(alpha=0) # set how the colormap handles 'bad' values
plt.imshow(thing, cmap=my_cmap)

¹

As for bad values, I wrote a function similar to this to make them arbitrary:

def get_bad_values(matr, value=0):
	new_matr = matr.astype(np.float)
	new_matr[new_matr == value] = np.nan
	return new_matr

Note that np.nan can only replace a np.float, never an int!

Updated i3 config for toggling between modes

Made everything simpler, based on what I usually really need:

bindsym $ms+s layout toggle tabbed stacking
bindsym $ms+Shift+s layout toggle split

TODO - something for “focus tab N in currently focused container”, a la what I have in qutebrowser/intellij.

Yearly dtb ritual of updating year

.. TODO - fix this, finally. +DAY=$(((365)*2+10#$(date +%j)))

ideavim splitters

Added this to ~/.ideavimrc for moving between splits

map <leader>h :action PrevSplitter<CR>
map <leader>l :action NextSplitter<CR>
map <leader>o :action MoveEditorToOppositeTabGroup<CR>

record terminal on linux with script

The script utility exists, and is installed by default on at least two systems I have access to. Works really well for interactive sessions!

script --timing=time.txt script.log
scriptreplay --timing=time.txt script.log

Seems to work when ran through screen, even when the screen is detached!

How to Record and Replay Linux Terminal Sessions using ‘script’ and ‘scriptreplay’ Commands

output terminal live on another screen

This is really cool: command line - How to have a terminal mirrored onto a second screen in a two-monitor setup? - Ask Ubuntu

script -f /tmp/lecture1.scrpt
tail -F /tmp/lecture1.scrpt

-f is for “Flush output after each write.” (as opposed to “write everything to the file when script is terminated”)

Markdown newline inside quote

Couldn’t understand why there are newlinen in my yearly review blog post from last year. So - in markdown, two spaces and then a line break create a line break.

So, like this:
One
two

Three
Four
Fine, no spaces Six, no spaces

Highlight to see spaces:

So, like this:  
One  
*two*  

> Three  
> Four  
> Fine, no spaces
> Six, no spaces

vim show trailing whitespaces

In connection to the above, yes. Updated ~/.vimrc with the following:

set listchars=tab:\:\ 
set listchars+=trail:◦

Looks like this:

vim CONVERSION ERROR - convert file to different encoding / save with other encoding.

For the above had to convert my ~/.vimrc to utf-8, not the default latin-1:
:w ++enc=utf-8

vim insert utf-8 characters

• Insert mode
• <C-v> u25e6 (for “◦”/U+25E6, for example)

i3 keybinding to make a screenshot and put it into jekyll assets directory

This makes a screenshot as usual, opens it, opens the jekyll dtb assets folder, and puts the screenhsot name in the primary clipboard. I look at the screenshot, if I like it - I drag it directly to the folder, then use the vim/jekyll binding to insert it in the markdown.

bindsym Mod3+Shift+s --release exec scrot -s -e 'mv $f ~/s/screenshots && nomacs ~/s/screenshots/$f & echo -n $f | xclip -selection c && thunar ~/o/dtb/assets/pics/screenshots/'

echo -n is echo without newline (otherwise it gets fed to xc with newline appended). Added to ~/.config/i3/config.

Feels incredibly ugly and unstable but works for me I guess. Ideally it’s long enough to be replaced with a bash script, but not sure it’s worth it. But if I end up doing more of these, I’ll create a one custom big parametrized bash script that I’ll call like ./big-script.sh screenshot.

vim jekyll binding to insert screenshot picture

map <leader>p i![](/assets/pics/screenshots/<esc>pa)<esc>0lli in ~/.vimrc

Inserts a picture with filename from primary selection, then goes back to the description. Used with new i3 screenshot keybinding from above. a in vim is “insert from next character”, so like A but with words.

I really do need to use a/e etc in vim more often.

camel / snake / kebab notation, note to self.

I seem to use more of-this-notation lately, instead of this_notation. Formalize this, not just for consistency, but to use this to my advantage - vim and company see these-words as separate, and this_word as one.

bash echo without newline at the end

echo -n doesn’t add a newline. Especially useful combined with xclip.

Haiku

WKD - Matsuo Basho Archives: - Timeline -:

1662 or 1663 寛文二年
His first known hokku at age 19:

春や来し年や行きけん小晦日
haru ya koshi toshi ya yukiken kotsugomori

has spring come
or has the year gone?
second-to-last-day
Tr. Barnhill

what is spring that came
or was it the year that went?
the Second Last Day
Tr. Ueda

Ist das Frühjahr gekommen
oder das Jahr vergangen?
Der vorletzte Tag.
Tr. Udo Wenzel

The Ukrainian translation seems imprecise, but still remains my favourite: Аніяких думок не лишилось в моїй голові наприкінці року!

Чи вже про весну, чи про минулий рік думати? Передостанній день року.

Переклад Геннадія Туркова

Bible

Послание к Римлянам 13:4 – Рим 13:4:

ибо начальник есть Божий слуга, тебе на добро. Если же делаешь зло, бойся, ибо он не напрасно носит меч: он Божий слуга, отмститель в наказание делающему злое.

Послание к Римлянам 13:4 – Рим 13:4: https://bible.by/verse/52/13/4/

Taskwarrior / zsh

Updated zsh alias to include non-work tasks tagged +A or +O from current sprint:

s () {task s \(project:w or \(sprint:$(date +%-V) \(+A or +O\)\) \) "$*"}

or has to be lowercase, brackets in taskwarrior’s filtering have to be escaped.

Google sheets linking between spreadsheets

Use a formula like this:

=IMPORTRANGE("https://docs.google.com/spreadsheets/d/1xrGsOD-yXuORqd8cFg21XOo3ZIw9QbSiNDcnSEatlPM/edit#gid=0", "Sheet1!A:A") ¹ For me it was ; as separator; may need to confirm connecting sheets.