serhii.net

English / Slack

Unfurl | Definition of Unfurl by Merriam-Webster - “expand, extend, fan (out), flare (out), open, outspread, outstretch, spread (out), stretch (out), unfold”

Fastmail calendar

Things I love so far:

• Can move/change single recurring events without issues, asks whether to do it for one or all of them only when I use the “Edit” button! Things I miss:
• Ability to “copy” an event in another calendar. Though I consider the need to do this an antipattern, and maybe I’ll find a workflow where I don’t need to do this often.

German / Deutsch

das Teufelszeug - appalling/hellish/infernal stuff (heard at work)

python console vim editing mode!

I so missed this. Adding to ~/.inputrc this line:

set editing-mode vi

makes all readline programs use vi mode, including Python interactive console. Wow.

Alternatively, this apparently works too when typed into python console:

import readline
readline.parse_and_bind("set editing-mode vi")

¹

Athame (readline replacement with complete vim support)

ardagnir/athame: Full vim for your shell (bash, zsh, gdb, python, etc)

One can install it in place of the usual readline locally or globally.

Installed for zsh, now I can use ci( bindings again!

.vimrc conversion saga

In [Day732]({{site.baseurl}}{% link _posts/2021-01-02-day732.markdown %}), I changed my ./vimrc to utf8 from latin-1, to be able to use the “◦” symbol to mark trailing spaces.

Well, it broke the vim macros for the link wiki (from [Day 450]({{site.baseurl}}{% link _posts/2020-06-23-day540.markdown %})) :( I had the latin version of the .vimrc backed up, falling back to it for now.

I need to think of a way to save these macros better, because even copypasting them to this dtb didn’t work and I had to do text encoding magic. I think this is exactly the time one should use a proper scripting language like Python, and write another small qutebrowser script that changes the contents of the filled textarea.

jekyll markdown links to posts

link links to pages, post_url links directly to posts inside _posts.

Link to pages:

{%raw%}
{% link _collection/document-name.md %}
{{ site.baseurl }}{% link _collection/document-name.md %}
{{ site.baseurl }}{% link _posts/2019-03-06-post-title.md %}
{{ site.baseurl }}{% link services/index.html %}
{{ site.baseurl }}{% link /assets/documents/pal-codes.pdf %}
{%endraw%}

Links to posts:

{%raw%}
{% post_url 2019-03-06-post-title.md %}
{{ site.baseurl }}{% post_url 2019-03-06-post-title.md %}
{{ site.baseurl }}{% post_url /folder/2019-03-06-post-title.md %}
{%endraw%}

Copied directly from this excellent page, I never found this explained in such a readable way: How to create internal links in Jekyll | Web Island Blog

TODO Jekyll / dtb / meta

Write a small script that allows me to easily link to days just by their day number.

Jekyll changed post permalinks

Before URI contained the date and was hard to link to. Now I changed this in _config.yml:

permalink: :title:output_ext

Links are now like this: https://www.pchr8.net/d/dtb/day749.html

Python representing infinity

float('inf') works for floats, but there’s no way to do it with ints. math.inf is also a float. ¹

vim interrupt operation via <Ctrl-C>

Made a typo, vim attempted to indent 20k lines (and started counting “xx lines to indent…”, intuitively pressed <Ctrl-C>, it successfully interrupted the operation!

Reddit/subreddit gallery viewer

https://scrolller.com/

matplotlib reverse colormaps

Every colomap has a reversed version named *_r (such as gray_r)! ¹

Papers - NLP - Chargrid

[1809.08799] Chargrid: Towards Understanding 2D Documents

Fastmail shortcuts

Keyboard shortcuts | Fastmail

Qutebrowser passthrough

Simplified bindings for passthrogh, added last line to ~/.config/qutebrowser/config.py

config.unbind('<Shift-Escape>', mode='passthrough')
config.bind('<Ctrl-Shift-+>', 'leave-mode', mode='passthrough')
config.bind('<Shift-I>', 'enter-mode passthrough')

Would allow me to use websites’ own shortcuts more often.

Random / interesting / identification

100 point check - Wikipedia (seen first here: I was a very happy FastMail customer until a hacker asked them to reset my passw… | Hacker News)

python serialization using dill

dill is like pickle, but serializes more stuff!

python pycharm unittest

Yet another way one can get the “no tests to run” error - if a test is not called test_..., it won’t be ran.

i3 sticky window / pin window

It’s easy to do a sticky window in i3!

Added to ~/.config/i3/config:

# Sticky window
bindsym $ms+p sticky toggle

Seaborn catplot titles (plotting, pandas, visualization)

Seaborn anonying facet title · Douglas C. Wu:

sns.catplot(x="target",y="score",hue='score-type',data=d,kind='bar',col='bundle',col_wrap=2,sharex=False,sharey=False).set_titles(col_template='{col_name}')

The set_titles(col_template='{col_name}') removes the usual “x=y” title in each of the sub-plots!

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