ohforest

Context variables are variables that can have different values depending on their context. They are similar to Thread-Local Storage in which each execution thread may have a different value for a variable. However, with context variables, there may be several contexts in one execution thread. The main use case for context variables is keeping track of variables in concurrent asynchronous tasks. -- https://realpython.com/python37-new-features/#context-variables

"""Example copied verbatim from Real Python."""

import contextvars

name = contextvars.ContextVar("name")
contexts = list()

ohforest

import os
def parent_directory():

  # Create a relative path to the parent 
  # of the current working directory 
  relative_parent = os.path.join(os.getcwd(), os.pardir)
  # Return the absolute path of the parent directory
  return os.path.abspath(relative_parent)

print(parent_directory())

ohforest

from app import db
from sqlalchemy import desc, event, func, orm
from sqlalchemy.ext.associationproxy import association_proxy
from sqlalchemy.ext.declarative import declared_attr
from sqlalchemy_utils import ArrowType, auto_delete_orphans
from slugify import slugify_unicode

tags = db.Table('tag_associations',
                db.Column('tag_id', db.Integer, db.ForeignKey('tags.id')),
                db.Column('article_id', db.Integer, db.ForeignKey('articles.id')))

ohforest

Useful Commands for Package Management in Homebrew

• Quick Stats
• Manage Packages and Dependencies
  • See Installed Packages
  • See Dependency Tree
  • Remove Hanging Dependencies
  • Remove All Packages
• Manage Files
  • Installation Paths

ohforest

import logging
import sys
import time
from typing import Callable

from fastapi import Request, Response
from fastapi.routing import APIRoute
from gunicorn.glogging import Logger
from loguru import logger
from starlette.background import BackgroundTask

ohforest

Docker Hub 镜像加速器

国内从 Docker Hub 拉取镜像有时会遇到困难，此时可以配置镜像加速器。

Dockerized 实践 https://github.com/y0ngb1n/dockerized

Docker daemon 配置代理

参考 Docker daemon 配置代理

ohforest

/* Useful celery config.

app = Celery('tasks',
             broker='redis://localhost:6379',
             backend='redis://localhost:6379')

app.conf.update(
    CELERY_TASK_RESULT_EXPIRES=3600,
    CELERY_QUEUES=(
        Queue('default', routing_key='tasks.#'),

ohforest

Context managers

In Python, a context manager is an object that can be used in a with statement. Here's a context manager that reports the total wall-clock time spent inside a with block:

import time

class Timer(object):
    def __init__(self, msg):
        self._msg = msg

ohforest

http {
  log_format bodylog '$remote_addr - $remote_user [$time_local] '
      '"$request" $status $body_bytes_sent '
      '"$http_referer" "$http_user_agent" $request_time '
      '<"$request_body" >"$resp_body"';

  lua_need_request_body on;

  set $resp_body "";
  body_filter_by_lua '

ohforest

// All you need to do is add a font that has pretty good itlaics support i.e Fira, Operator, etc. and then add these two params to your existing User settings.

{
 "editor.fontFamily": "'Operator Mono', Menlo, Monaco, 'Courier New', monospace",
 "editor.tokenColorCustomizations": {
     "textMateRules": [
      {
        "scope": [
          "comment",
          "keyword.control",