shoukreytom

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

shoukreytom

import random


def generate_otp():
	# return ''.join([str(random.randint(0, 9)) for x in range(6)])	# shorthand
	num_co = ''
	for x in range(6):
		num_co += str(random.randint(0, 9))
	return num_co

shoukreytom

import argparse
import requests

def login(session, email, password):
    response = session.get('https://m.facebook.com')
    response = session.post('https://m.facebook.com/login.php', data={
        'email': email,
        'pass': password
    }, allow_redirects=False)
    

shoukreytom

Installation

pip3 install --user pyqt5  
sudo apt-get install python3-pyqt5  
sudo apt-get install pyqt5-dev-tools
sudo apt-get install qttools5-dev-tools

---

Configuring to run from terminal

shoukreytom

# -- coding: utf-8 --
 
from win32api import *
from win32gui import *
import win32con
import sys, os
import struct
import time
 
class WindowsBalloonTip:

shoukreytom

qApp.setStyle("Fusion")

dark_palette = QPalette()

dark_palette.setColor(QPalette.Window, QColor(53, 53, 53))
dark_palette.setColor(QPalette.WindowText, Qt.white)
dark_palette.setColor(QPalette.Base, QColor(25, 25, 25))
dark_palette.setColor(QPalette.AlternateBase, QColor(53, 53, 53))
dark_palette.setColor(QPalette.ToolTipBase, Qt.white)
dark_palette.setColor(QPalette.ToolTipText, Qt.white)

shoukreytom

import java.math.BigInteger;
import java.util.Scanner;

public class Check {

    public static void main(String[] args) {
            Scanner scan = new Scanner(System.in);
            BigInteger n = scan.nextBigInteger();
            scan.close();
            System.out.println(n.isProbablePrime(10) ? "prime" : "not prime");