title: Best way to 'listen' to s3 bucket for new file?
body: <p>I have connected zapier to a webhook I am listening too, which sends a JSON file into my s3 bucket. </p>
  
  <p>I have some python code that I want to execute when a new file is uploaded into the bucket, in real time over the file. </p>
  
  <p>What is the best way to 'listen' for the upload of this file into the s3 bucket? </p>