title: How to upload a file to S3 and make it public using boto3?
body: <p>I am able to upload an image file using:</p>
  
  <pre><code>s3 = session.resource('s3')
  bucket = s3.Bucket(S3_BUCKET)
  bucket.upload_file(file, key)
  </code></pre>
  
  <p>However, I want to make the file public too. I tried looking up for some functions to set ACL for the file but seems like boto3 have changes their API and removed some functions. Is there a way to do it in the latest release of boto3?</p>