How to create a boto3 DynamoDB resource

Please note that this snippet is part of the DynamoDB-Simpsons-episodes-full-example repository on GitHub.

First of all, you have to import the module boto3 import boto3 and then create a YAML file named credentials.yml where you store your AWS public and secret keys.

The YAML file should have the following structure:

dynamodb:
    AWS_SERVER_PUBLIC_KEY: xxxxxxxxx
    AWS_SERVER_SECRET_KEY: xxxxxxxxx
    REGION_NAME: us-east-1

After that you can read your credentials and assign them to the variables of your script:

# Load credentials from YAML file
    with open("credentials.yml", "r") as keyholder:
        try:
            credentials=yaml.safe_load(keyholder)
        except yaml.YAMLError as exc:
            print(exc)

AWS_SERVER_PUBLIC_KEY=credentials['dynamodb']['AWS_SERVER_PUBLIC_KEY']
AWS_SERVER_SECRET_KEY=credentials['dynamodb']['AWS_SERVER_SECRET_KEY']
REGION_NAME=credentials['dynamodb']['REGION_NAME']

and, finally, create your dynamodb resource:

dynamodbRes = boto3.resource(
    "dynamodb",
    region_name=REGION_NAME,
    aws_access_key_id=AWS_SERVER_PUBLIC_KEY,
    aws_secret_access_key=AWS_SERVER_SECRET_KEY,
)

print(dynamodbRes)

This will output:

dynamodb.ServiceResource()