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: “We also specify the AWS::AccountId pseudo parameter because in the next section, we will deploy the StackSet in multiple regions but in the same account, so we won’t need to expose the AWS account ID in the template.”

A block of code is set as follows:

import boto3def check_if_key_exists():
    client = boto3.client(‹ec2›)
    try:
        resp = client.describe_key_pairs(KeyNames=[«mykey»])
    except Exception:

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

        return False    if len(resp['KeyPairs']) == 0:
        return False
    return True

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

$ aws cloudformation deploy \

                   --stack-name tag \
                   --template-file tag.yaml \
                   --capabilities CAPABILITY_IAM

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: “Once both stack instances are created, we will see that their status is CURRENT in the Stack instances section.”

Tips or important notes

Appear like this.