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Tutorial: MQTT and the retain flag

Assumptions and setup

This tutorial assumes:

• a single computer (like a Raspberry Pi)
• MQTT broker (like Mosquitto) running
• the mosquitto_pub and mosquitto_sub commands are available.

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# best practice: linux
nano ~/.pgpass
*:5432:*:username:password
chmod 0600 ~/.pgpass

# best practice: windows
edit %APPDATA%\postgresql\pgpass.conf
*:5432:*:username:password

# linux

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pyenv local 3.7.5
pyenv exec python -m pipenv sync -d

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pyenv local 3.7.5
pyenv exec python -m pipenv sync -d

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with open('expected_data.json', 'w', encoding='utf8') as json_file:
    json.dump(EXPECTED_DATA, json_file, ensure_ascii=False, indent=4, sort_keys=True)

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# Конфигурация для запуска nginx в качестве SSL прокси для других контейнеров.
# Не забудьте создать сеть перед запуском этой конфигурации:
#     docker network create nginx-proxy
# и добавить следующую строку к проксируемым контейнерам '--network nginx-proxy'.

version: '2'

services:
  nginx:
    image: nginx

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import json
path_src = './references/migrations/0004_speciality.json'
path_dst = './references/migrations/0004_speciality.json'
src = open(path_src, 'r')
dst = open(path_dst, 'w')
payload = json.loads(src.read())
result = []
index = 0

for i in payload:

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FROM alpine:3.8
MAINTAINER Ruslan Popov <[email protected]>

ARG SOURCE_VERSION=UNSPECIFIED
ARG SOURCE_COMMIT=UNSPECIFIED

ENV \
    SOURCE_VERSION=${SOURCE_VERSION} \
    SOURCE_COMMIT=${SOURCE_COMMIT} \

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#!/usr/bin/env python
import math

OUTBITS = 16
BITS_PER_CYCLE = 16
BITS_PER_QUARTER = BITS_PER_CYCLE - 2
BITS = 8
ONE = 1 << BITS
HALF = ONE / 2
C = 70710 * ONE / 100000

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#!/usr/bin/env python

"""
Install packages:

    wajig install pylint pyflakes pep8 pychecker
    pip install flake8
"""

import os