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import scrapy
from scrapy.Fetch import Fetch
import asyncio
import aiohttp

class QuotesSpider(scrapy.Spider):
    name = "quotes"

    async def start_requests(self):
        urls = [

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from django.db.models import OuterRef

weapons = Weapon.objects.filter(unit__player_id=OuterRef('id'))
units = Unit.objects.filter(player_id=OuterRef('id'))

qs = Player.objects.annotate(weapon_count=SubqueryCount(weapons),
                             rarity_sum=SubquerySum(units, 'rarity'))

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#!/usr/bin/python3
import argparse
import logging
import subprocess
import os
import tempfile
from tempfile import mkstemp

import configparser
import gzip

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/*
  objects_id_object_seq - sequence name
  objects               - table name
  id_object             - ID field name
  seq                   - standard postfix

Doc for setval() and nextval(): https://www.postgresql.org/docs/current/functions-sequence.html
*/

CREATE SEQUENCE IF NOT EXISTS objects_id_object_seq; -- IF NOT EXISTS is works only in Postgres 9.5+

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// Setup Firestore. Note that all of these will be asyncronous tasks and can have a .then attached. Write in a config process for Firebase. Include the necessary process.env files and instructions how to make a .env file.

***************************************************************
	
// Add data - C
firestore.collection("CollectionName").add({
	key: value,
	key: value,
})

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Step by step how to pull a private DockerHub hosted image in a Kubernetes YML.

export DOCKER_REGISTRY_SERVER=https://index.docker.io/v1/
export DOCKER_USER=Type your dockerhub username, same as when you `docker login`
export DOCKER_EMAIL=Type your dockerhub email, same as when you `docker login`
export DOCKER_PASSWORD=Type your dockerhub pw, same as when you `docker login`

kubectl create secret docker-registry myregistrykey \
  --docker-server=$DOCKER_REGISTRY_SERVER \
  --docker-username=$DOCKER_USER \

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# start / stop / restart / status
systemctl start test
systemctl stop test
systemctl restart test
systemctl status test

# logs use journalctl: 

# tail the logs for unit `django`
journalctl -f -u django

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RewriteEngine On
RewriteRule ^$ http://127.0.0.1:8080/ [P,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ http://127.0.0.1:1337/$1 [P,L]

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Flutter

A quick cheatsheet of useful snippet for Flutter

Widget

A widget is the basic type of controller in Flutter Material. There are two type of basic Widget we can extend our classes: StatefulWidget or StatelessWidget.

Stateful

StatefulWidget are all the widget that interally have a dynamic value that can change during usage. It can receive an input value in the constructor or reference to functions. You need to create two classes like:

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import datetime

from django.conf import settings
from django.contrib.auth import logout
from django.contrib.auth.models import User
from django.contrib.sessions.models import Session
from django.http import HttpRequest
from django.utils.importlib import import_module