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Pyenv

Install Multiple Python Versions for Specific Project

Home project: https://github.com/pyenv/pyenv
Reference to: https://www.tecmint.com/pyenv-install-and-manage-multiple-python-versions-in-linux/

1. Install pyenv in Linux

Python MRO

MRO (Method Resolution Order)

most of codes are referenced from https://tibetsandfox.tistory.com/26

zsh prompt

show near by 2 directory only

# prompt
autoload -Uz vcs_info
precmd() { vcs_info }

zstyle ':vcs_info:git:*' formats '%b '

UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

	from django.db.model.sql import Query # Query()는 개발자가 정의한 QuerySet을 읽어서 실제 SQL을 생성해주는 구현체다


	class QuerySet:
	query: Query = Query() # 이것을 나는 메인쿼리 라고 명명한다.
	_result_cache: List[Dict[Any,Any]] = dict() # SQL의 수행결과를 여기 저장해놓고 재사용한다 (QuerySet Cache)
	# QuerySet 재호출시 이 프로퍼티에 저장된 데이터가 없으면 SQL을 호출해서 데이터를 가져온다.

	_prefetch_related_lookups: Tuple[str] = () # prefetch_related(여기선언된 값들) 을 이 프로퍼티에 저장함
	# 이것을 나는 추가쿼리(셋)이라고 명명한다.

	FROM nogil/python

	WORKDIR /

	# If enable gil uncomment below:
	# ENV PYTHONGIL=1

	COPY ./main.py /main.py

	CMD ["python", "/main.py"]

	#!/bin/sh

	# use this line. if you want interact with terminal
	#
	# docker-compose exec web python3 manage.py createsuperuser --username "admin" --email "[email protected]"

	# populate data for testing
	#
	# NOTE below code affect indent
	docker-compose exec web sh -c "

	<div id="errors" style="
	background: #c00;
	color: #fff;
	display: none;
	margin: -20px -20px 20px;
	padding: 20px;
	white-space: pre-wrap;
	"></div>
	<div id="root"></div>
	<script>

	<div id="errors" style="
	background: #c00;
	color: #fff;
	display: none;
	margin: -20px -20px 20px;
	padding: 20px;
	white-space: pre-wrap;
	"></div>
	<div id="root"></div>
	<script>

	autoload -Uz vcs_info
	precmd() { vcs_info }

	zstyle ':vcs_info:git:*' formats '%b '

	setopt PROMPT_SUBST
	PROMPT='%F{#f8f8f2}%*%f %F{#bd93f9}%2~%f% %F{#ff5555}${vcs_info_msg_0_}%f$ '