Jingchao Hu observerss

Gevent Pool/Group Alike in Python3 Asyncio

Python3 Asyncio implements an event loop, but in quite low level, it's missing some basic helpers that can make your life a lot easier.

The Pool and Group are typical missing ones. Compare these codes below

Simple Loop

without group

seeing this puzzle in glowing's jobs page

https://glowing.com/jobs/mobiledeveloper#mtop

here's my solution

Using Reids As Database

Redis is very performant, due to performance consideration, sometimes we need to use Redis as a database, when querying a redis database, we need to consider indexing and filtering.

Single Index

We can use SortedSet as Index.

Running redis using upstart on Ubuntu

I've been trying to understand how to setup systems from the ground up on Ubuntu. I just installed redis onto the box and here's how I did it and some things to look out for.

To install:

	[
	{
	"label": "内网网关地址",
	"name": "gateway",
	"value": "10.86.30.1"
	},
	{
	"label": "上班打卡时间范围",
	"name": "clockInRange",
	"value": "07:00-11:00"

	! function (t) {
	if ("object" == typeof exports && "undefined" != typeof module) module.exports = t();
	else if ("function" == typeof define && define.amd) define([], t);
	else {
	("undefined" != typeof window ? window : "undefined" != typeof global ? global : "undefined" != typeof self ? self : this).buffer = t()
	}
	}(function () {
	return function () {
	return function t(r, e, n) {
	function i(f, u) {

	{
	"metadata": {
	"name": "",
	"signature": "sha256:f7fc0e66200bb5a9cae8e5e59abfaa99691caa881252e9266f11e7cffc7dafe6"
	},
	"nbformat": 3,
	"nbformat_minor": 0,
	"worksheets": [
	{
	"cells": [

	import time
	from collections import deque

	def throttled_call(func, args=(), kwargs={}, threshold_per_minute=60):
	"""Throttling the function call with ``threshold_per_minute`` calls per minute.

	This is useful when the function request a remote service that having throttling policy.
	We must honor the throttling, otherwise we will be banned.

	:param func: the function to be called

	def chop(matrix, box, direction, results=None):
	if results is None:
	results = []
	x1, y1, x2, y2 = box
	w = x2 - x1 + 1
	h = y2 - y1 + 1
	if w <= 0 or h <= 0:
	return results
	else:
	if direction == 0:

	#! /bin/sh
	### BEGIN INIT INFO
	# Provides: redis-server
	# Required-Start: $syslog
	# Required-Stop: $syslog
	# Should-Start: $local_fs
	# Should-Stop: $local_fs
	# Default-Start: 2 3 4 5
	# Default-Stop: 0 1 6
	# Short-Description: redis-server - Persistent key-value db