To get the most out of this book

This book uses Python for the code, and assumes that the reader is comfortable reading this programming language, although an expert level is not required.

Git and GitHub are used throughout the book for source control and for tracking changes. It is assumed that the reader is comfortable with using them.

Familiarity with web services and with RESTful APIs is useful for understanding the different concepts that are presented.

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the Support tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On-Docker-for-Microservices-with-Python. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://static.packt-cdn.com/downloads/9781838823818_ColorImages.pdf.

Code in Action

You can check the code in action videos for this book at http://bit.ly/34dP0Fm.

Conventions used

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

CodeInText: 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: "This will generate two files: key.pem and key.pub, with a private/public pair."

A block of code is set as follows:

class ThoughtModel(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(50))
    text = db.Column(db.String(250))
    timestamp = db.Column(db.DateTime, server_default=func.now())

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

# Create a new thought
new_thought = ThoughtModel(username=username, text=text, timestamp=datetime.utcnow())
db.session.add(new_thought)

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

$ openssl rsa -in key.pem -outform PEM -pubout -out key.pub

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."

Warnings or important notes appear like this.

Tips and tricks appear like this.