sns_error_notification/lambda_function.py

#! /usr/bin/env python3
import boto3
import json
import traceback

# Insert original code here:

# Rename your original lambda_handler() to lambda_handler_noemail()
def lambda_handler_noemail(event, context):
    # if you start generating too many emails, you can always change
    # the handler back to this.
    return True

# Make this your caller.
def lambda_handler(event, context):
    # Set this to an SNS topic you'd like to publish to.
    sns_arn = 'arn:aws:sns:us-east-2:1234567890:lambda-errors',
    try:
        snsclient = boto3.client('sns')
        return lambda_handler_unhandled(event, context)
    except Exception as e:
        subject = f'Execution Error in {context.function_name}'
        estr = str(e)
        tb = traceback.format_exc()
        try:
            event_dump = json.dumps(event, indent=2)
        except:
            event_dump = "ERROR"
        try: 
            context_dump = vars(context)
        except:
            context_dump = "ERROR"
        message = f'Exception: {estr}\n\nTraceback: {tb}\n\nEvent: {event_dump}\n\nContext: {context_dump}\n'
        # Only happens if there was an exception
        snsclient.publish(
            Subject=subject,
            TopicArn=sns_arn,
            Message=message
        )
        raise