Pierre-Henri bourdeau

"""
The Session.commit() operation unconditionally issues Session.flush() before emitting COMMIT on relevant database

There are only 2 scenarios I see when session.flush() could be call manually:
- `autoflush = False`: then flush might been needed if the object need to be query in the Session
- to get the AUTOINCREMENT ID which are EVIL (🔪🔪🔪🐱)

I wrote a few examples to illustrate this.
"""

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Workflow

Inheritance & DI

Multiple inheritance can lead to multi level diamond diagram. In Python it is solved by C3 linearization.

Python doesn't need DI because it has super(). It doesn't work like parent() in other Typed programming languages such as Java or PHP.

In multiple inheritance super() doesn't call the parents but the ancestors:

class Adam(): pass

APPLICATION DESIGN

Inheritance & Composition 😱

Don't use inheritance as another way to copy/paste code.

class EmailRubbish
{
 public function sendEmail(string $email, string $subject): void

	import asyncio
	from random import randint
	import aiofiles
	import request
	import aiohttp


	async def async_http_request():
	"""
	I'm using aiohttp lib to make the http request and it's

	import pandas as pd
	import time
	from contextlib import contextmanager
	import dask.dataframe
	import redis
	import struct
	import numpy as np
	import pickle

	import sys
	import hashlib

	difficulty = 8
	block = "alice:0.0001:bob:whatever"
	nonce = 0
	zeros = ""

	for i in range(difficulty):
	zeros += "0"