YabZhang YabZhang

FWIW: I (@rondy) am not the creator of the content shared here, which is an excerpt from Edmond Lau's book. I simply copied and pasted it from another location and saved it as a personal note, before it gained popularity on news.ycombinator.com. Unfortunately, I cannot recall the exact origin of the original source, nor was I able to find the author's name, so I am can't provide the appropriate credits.

Effective Engineer - Notes

By Edmond Lau
Highly Recommended 👍
http://www.theeffectiveengineer.com/

What's an Effective Engineer?

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

"Build tools for others that you want to be built for you." - Kenneth Reitz
"Simplicity is alway better than functionality." - Pieter Hintjens

	def get_count(q):
	count_q = q.statement.with_only_columns([func.count()]).order_by(None)
	count = q.session.execute(count_q).scalar()
	return count

	q = session.query(TestModel).filter(...).order_by(...)

	# Slow: SELECT COUNT(*) FROM (SELECT ... FROM TestModel WHERE ...) ...
	print q.count()

	import uuid
	import wtforms_json
	from sqlalchemy import not_
	from sqlalchemy.dialects.postgresql import UUID
	from wtforms import Form
	from wtforms.fields import FormField, FieldList
	from wtforms.validators import Length

	from flask import current_app as app
	from flask import request, json, jsonify, abort

	from concurrent.futures import ThreadPoolExecutor
	from tornado.concurrent import run_on_executor, Future
	from tornado import httpclient,ioloop,web,gen
	import request
	import sys

	httpclient.AsyncHTTPClient.configure('tornado.curl_httpclient.CurlAsyncHTTPClient', max_clients=10)
	# TODO: remove
	class Foo(Exception): pass
	def dot():

	from datetime import date
	from sqlalchemy import cast, DATE
	Match.query.filter(cast(Match.date_time_field, DATE)==date.today()).all()