Justintime50

import time
from threading import BoundedSemaphore, Thread


def main():
    max_num_threads = 100
    thread_limiter = BoundedSemaphore(max_num_threads)

    # OS's have limits on the number of threads that can be opened at once,
    # be aware of that with this number (eg: don't try something like 10,000+)

Justintime50

server {
    listen 80;
    index index.php index.html;
    server_name localhost;
    error_log  /var/log/nginx/error.log;
    access_log /var/log/nginx/access.log;
    root /var/www/html/site;

    location / {
        try_files $uri $uri/ /index.php;

Justintime50

Resetting MySQL Replication

If you have a master/slave replication setup that comes across something similar to error 1236 where the binlogs get out of sync, you can run the following commands to get things back on track.

# On the master node
SHOW MASTER STATUS;

# On the slave node
STOP SLAVE;

Justintime50

Insecure or Mixed Content Production Laravel

Make sure your AppServiceProvider.php file has a boot function that looks like this to avoid the was not allowed to run insecure content error in production:

use Illuminate\Support\Facades\URL;

/**
 * Bootstrap any application services.
 *

Justintime50

Working with SSH Keys

Follow this guide to generate an SSH private/public key pair, retrieve it, or send it to a client machine.

Usage

# 1) Generate an SSH Key
ssh-keygen -t rsa

Justintime50

Setup a Mail Server on macOS

After years of trying to setup a mail server on macOS without requiring dependencies or messing with ports to trick my ISP into letting mail out, I figured out a solution.

Note: This guide is opinionated towards a Gmail setup.

Steps

1. Backup the existing Postfix configuration:

Justintime50

Import or Export SQL from a Docker Container

To export SQL, you must have permissions to do so (AKA: root).

# Importing SQL
docker exec -i CONTAINER_NAME mysql -uUSERNAME -pPASSWORD DATABASE_NAME < MY_FILE.sql

# Exporting SQL
docker exec -i CONTAINER_NAME mysqldump -uroot -p DATABASE_NAME &gt; MY_FILE.sql

Justintime50

Package non-Python Assets into your Python Package

There are times where you may need to include non-Python assets in your Python package for distribution. This may include data files or JSON assets from a submodule for example that your Python package needs to reference. By default, Python will not include these assets in the bdist/sdist. You can either include an empty __init__.py file in that submodule (even if the project isn't Python) and rely on the magic of packages=setuptools.find_packages() in setup.py or you can explicitly include those non-Python assets by using the following steps.

1. In setup.py, include an array of locations to include. These are glob matching patterns. An example of this looks like the following:

package_data={
    'top_level_package': [
 'path/to/assets/one/*.json',

Justintime50

import requests

# Gets the complete list of AWS IP ranges and parses the results
# Usage: venv/bin/python aws_ip_range_parser.py

AWS_IP_URL = 'https://ip-ranges.amazonaws.com/ip-ranges.json'
REGIONS_TO_FILTER = [
    'us-east-2',
    'us-west-2',
]

Justintime50

[{
    "Note": "The first two digits (ranging from 10–43) correspond to the province, while the last two digits correspond either to the city/delivery zone (range 01–50) or to the district/delivery zone (range 51–99). Afghanistan Postal code lookup",
    "Country": "Afghanistan",
    "ISO": "AF",
    "Format": "NNNN",
    "Regex": "^\\d{4}$"
}, {
    "Note": "With Finland, first two numbers are 22.",
    "Country": "Åland Islands",
    "ISO": "AX",