import boto3

import json

def lambda_handler(event, context):

# Extract relevant information from the S3 event trigger

bucket_name = event['Records'][0]['s3']['bucket']['name']

object_key = event['Records'][0]['s3']['object']['key']

# Perform desired operations with the uploaded file

print(f"File '{object_key}' was uploaded to bucket '{bucket_name}'")

# Example: Send a notification via SNS

sns_client = boto3.client('sns')

topic_arn = 'arn:aws:sns:us-east-1:<account-id>:s3-lambda-sns'

sns_client.publish(

TopicArn=topic_arn,

Subject='S3 Object Created',

Message=f"File '{object_key}' was uploaded to bucket '{bucket_name}'"

)

# Example: Trigger another Lambda function

# lambda_client = boto3.client('lambda')

# target_function_name = 'my-another-lambda-function'

# lambda_client.invoke(

# FunctionName=target_function_name,

# InvocationType='Event',

# Payload=json.dumps({'bucket_name': bucket_name, 'object_key': object_key})

# )

return {

'statusCode': 200,

'body': json.dumps('Lambda function executed successfully')

}