Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system.”

A block of code is set as follows:

FROM python:3
SELECT mean("value") FROM "temperature"
WHERE $timeFilter
GROUP BY time($__interval), "station" fill(none)

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

listener 1883
allow_anonymous true

Any command-line input or output is written as follows:

% docker-compose down

Bold: Indicates a new term, an important word, or words that you see onscreen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “Click on Load Data | API Tokens.”

Tips or important notes

Appear like this.