martin-kokos

OpenCV functions use argument to modify their behavior. These arguments are integers which have special meaning, also called enums. These enums share the same integer space. You can sometimes see this in the wild and in docs that people use nondescript numbers as options when calling a function (even without keywords) eg. cv2.putText(img, "yolo", (10, 20), 0, 1, (255, 255, 255), 1, 2). Due to this it is possible to set the wrong option to the wrong funciton and OpenCV he no way to check for this (not that it does much checking).

For example the following example unexpectedly opens the image in grayscale mode because cv2.ROTATE_180 is int(0) and that is interpreted in this function as cv2.IMREAD_GRAYSCALE (sometimes the prefix of the option is not obvious):

img = cv2.imread('myimage.jpg', cv2.ROTATE_180)

(Sometimes, options can be combined by for more "fun" just like bitmasks - by adding them up)

martin-kokos

  ❌ FAIL: torch=2.1.0 torchvision=0.1.6 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.1.7 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.1.8 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.1.9 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.2.0 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.2.1 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.2.2 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.2.2.post2 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.2.2.post3 (exit=1)
  ❌ FAIL: torch=2.1.0 torchvision=0.9.1 (exit=1)

martin-kokos

This is a very minimal setup how to achieve a minimal metrics server for a small project or an embedded setup. Install VictoriaMetrics. https://docs.victoriametrics.com/quick-start/#starting-vm-single-from-a-binary

Install

Essentially:

VM_VERSION="v1.112.0"
wget -O /tmp/victoria-metrics.tar.gz "https://github.com/VictoriaMetrics/VictoriaMetrics/releases/download/${VM_VERSION}/victoria-metrics-linux-arm64-${VM_VERSION}.tar.gz"
sudo tar -xvf /tmp/victoria-metrics.tar.gz -C /usr/local/bin
sudo useradd -s /usr/sbin/nologin victoriametrics || true

martin-kokos

Install gcc

apt install software-properties-common  # installs apt-add-repository
# apt-add-repository ppa:ubuntu-toolchain-r/test
apt-add-repository universe
apt update
apt install gcc-14 g++-14
ll /usr/bin/gcc-14
ll /usr/bin/g++-14
update-alternatives --display gcc

martin-kokos

'''
If the tasks are inequally sized, it may happen with starmap and similar schedulers
which schedule tasks ahead of time, that some workers are lucky and finish early and some unlucky
and finish much later having the effect of the task batch using all CPU cores at first,
but then lucky workers finishing and core sitting idle.

This task manager serves as an example on how to have workers fetch tasks from a Queue.

Joblib, Pool.starmap or something else might be better, but maybe this is useful.
'''

martin-kokos

# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

JAVA_ANT_ENCODING=UTF-8

ESVN_REPO_URI="https://josm.openstreetmap.de/svn/trunk"
inherit eutils java-pkg-2 java-ant-2 subversion desktop

martin-kokos

'''
Provides occupancy number http://localhost:8080/kravi_hora
'''

import logging
import re
import requests

from bs4 import BeautifulSoup
from aiohttp import web

martin-kokos

Webexpo 2019

Line-up
Recordings (added progressively)

★★★ How to Bullsh*t Your Way To Number 1, Oobah Butler

social engineering,media manipulation

• Note: Basically How to Become TripAdvisor’s #1 Fake Restaurant

★★☆ Flixbus about their mobile web

martin-kokos

import datetime as dt
from time import sleep as s

curr_date = dt.datetime.now().replace(month=11,day=27)

class Candles(list):
    def __repr__(self):
        items = ['\N{CANDLE}' if i else '_' for i in self]
        return '[{items}]'.format(items=', '.join(items))

martin-kokos

cat myfile | python3 -c "expr='YOUR_REGEXP'; import sys; import re; [print(match) for match in re.findall(expr, ''.join(sys.stdin.readlines()))]"