import * as aws from '@pulumi/aws'
const bucket = new aws.s3.Bucket("mybucket");
bucket.onObjectCreated("newObject", async (ev) => {
    console.log(JSON.stringify(ev));
});
export const bucketName = bucket.id;

In this example, the

onObjecyCreated

method is related to the JS, is there any similar method available in Python for logging purpose?

There is not one built in for Python, but you can achieve the same thing by creating your own

BucketNotification

and

LambdaFunction

resources.