alvarocavalcanti

FROM python:3.7
ENV PYTHONUNBUFFERED 1

WORKDIR /code

# Copying the requirements, this is needed because at this point the volume isn't mounted yet
COPY requirements.txt /code/

# Installing requirements, if you don't use this, you should.
# More info: https://pip.pypa.io/en/stable/user_guide/

keidrun

Answer

Use custom nullable types instead of original sql.Null types like sql.NullBool, sql.NullFloat64, sql.NullInt64 or sql.NullString.

superjose

# Reference: https://www.exclamationlabs.com/blog/continuous-deployment-to-npm-using-gitlab-ci/

# GitLab uses docker in the background, so we need to specify the 
# image versions. This is useful because we're freely to use
# multiple node versions to work with it. They come from the docker
# repo.
# Uses NodeJS V 9.4.0
image: node:9.4.0

# And to cache them as well.

tossmilestone

How to manually setup flake8 as PyCharm external tool

File / Settings / Tools / External Tools / Add
Name: Flake8
Program: $PyInterpreterDirectory$/python
Parameters: -m flake8 --max-complexity 10 --ignore E501 $FilePath$
Working directory: $ProjectFileDir$

Output Filters / Add
Name: Filter 1

icu0755

Query Caching

• Django-cachalot http://django-cachalot.readthedocs.io/en/latest/
• Johnny Cache https://github.com/jmoiron/johnny-cache (deprecated)
• Cache Machine https://cache-machine.readthedocs.io/en/latest/

init.py:

import johnny.cache
johnny.cache.enable()

lucaspg96

#This script is independet of lib or python version (tested on python 2.7 and 3.5)

import telegram
#token that can be generated talking with @BotFather on telegram
my_token = ''

def send(msg, chat_id, token=my_token):
	"""
	Send a mensage to a telegram user specified on chatId
	chat_id must be a number!

rondy

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?

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

bergantine

data_uri = open("sample.png", "rb").read().encode("base64").replace("\n", "")
# HTML Image Element
img_tag = '<img alt="" src="data:image/png;base64,{0}">'.format(data_uri)
print img_tag
# CSS Background Image
css = 'background-image: url(data:image/png;base64,{0});'.format(data_uri)
print css