Liko likohank

https://www.google.com/search?q=python3+unicode+string+how+to+store+in+memory&newwindow=1&sxsrf=AOaemvI_YtbNmtqfs4sSHntKeKBLDPSJPA%3A1642564421003&ei=RIvnYfHjPMzZhwP2pqmoCw&ved=0ahUKEwjxldam9bz1AhXM7GEKHXZTCrUQ4dUDCA4&uact=5&oq=python3+unicode+string+how+to+store+in+memory&gs_lcp=Cgdnd3Mtd2l6EAM6BwgAEEcQsANKBAhBGABKBAhGGABQxglYxglghzloAnACeACAAYcBiAGHAZIBAzAuMZgBAKABAcgBCMABAQ&sclient=gws-wiz

https://stackoverflow.com/questions/26079392/how-is-unicode-represented-internally-in-python

https://www.python.org/dev/peps/pep-0393/

Python 3.3 switched to a new internal representation, using the most compact form needed to represent all characters in a string. 
Either 1 byte, 2 bytes or 4 bytes are picked. ASCII and Latin-1 text uses just 1 byte per character, 
the rest of the BMP characters require 2 bytes and after that 4 bytes is used.

	# Based on:
	# https://gist.github.com/DakuTree/98c8362fb424351b803e
	# https://gist.github.com/jordan-wright/5770442
	# https://gist.github.com/DakuTree/428e5b737306937628f2944fbfdc4ffc
	# https://stackoverflow.com/questions/60416350/chrome-80-how-to-decode-cookies
	# https://stackoverflow.com/questions/43987779/python-module-crypto-cipher-aes-has-no-attribute-mode-ccm-even-though-pycry

	import os
	import json
	import base64

	### NOT A SCRIPT, JUST A REFERENCE!

	# install dante-server
	sudo apt update
	sudo apt install dante-server

	# or download latest dante-server deb for Ubuntu, works for 16.04 / 18.04 / 20.04:
	wget http://archive.ubuntu.com/ubuntu/pool/universe/d/dante/dante-server_1.4.2+dfsg-7build3_amd64.deb
	# or older version:
	wget http://ppa.launchpad.net/dajhorn/dante/ubuntu/pool/main/d/dante/dante-server_1.4.1-1_amd64.deb

	package main

	import (
	"runtime"
	"sync"
	"sync/atomic"
	)

	type spinLock uint32

	Python Multiprocessing Value Blocking
	Python Multiprocessing Value 多进程多线程情况下调用 kill 后访问进程通信变量阻塞

	When call kill in multi process, other process whill block when try to visit the Value,
	just replace SIGKILL to SIGQUIT


	from multiprocessing import Value
	from multiprocessing import Process


	echo 1 > /proc/sys/vm/overcommit_memory

	if your're sure that your system has enough memory. See Linux over commit heuristic.
	https://stackoverflow.com/questions/38688824/linux-over-commit-heuristic


	内存充足，但是当 python 调用 thread 创建线程或者创建Process 进程时，报内存失败

	cat /proc/sys/vm/overcommit_memory

	export PS1="\[\033[01;31m\]\u\[\033[00m\]@\[\033[01;32m\]\h\[\033[00m\][\[\033[01;33m\]\t\[\033[00m\]]:\[\033[01;34m\]\w\[\033[00m\]$ "

	加进 bashrc

	:syntax off
	:se binary nospell
	:setgl noswap
	:set undolevel=0
	:set undofile=


	set undolevels=-1
	set noswapfile


	在.vimrc文件里加上配置语句：

	在.vimrc中设置set t_ti= t_te=

	1. lateral view numeric_range （problem : Lateral View multiple array）
	------- 将一条pv日志中，包含了多个广告的pv信息，且统一使用list 做存储的情况 lateral view numeric_range

	select cookie,
	array_index( product_id_arr, n ) as product_id,
	array_index( catalog_id_arr, n ) as catalog_id,
	array_index( qty_id_arr, n ) as qty
	from table
	lateral view numeric_range( size( product_id_arr )) n1 as n;