This assumes you are familar with the basic configurations needed to connect to Amazon Web Services (AWS) using Python boto3. If not, check out my article Python (Scripting) - Getting Started with Amazon Web Services (AWS) boto3.

Here is the minimal boilerplate code without any error handling to publish a message to one of your Simple Notification Service (SNS) Topcis.

#!/usr/bin/python3
import boto3

client = boto3.client('sns')
client.publish(
    TopicArn='arn:aws:sns:us-east-1:123456789012:mytopic',
    Subject='Hello',
    Message='World'
)

Here is a more practical example, with try/except/else error handling.

#!/usr/bin/python3
import boto3
import sys

try:
  client = boto3.client('sns')
except Exception as exception:
  print(exception)
  sys.exit(1)

try:
  client.publish(
    TopicArn='arn:aws:sns:us-east-1:123456789012:mytopic',
    Subject='Hello',
    Message='World'
  )
except Exception as exception:
  print(exception)