title: How to download everything in that folder using boto3
body: <p>I want to download all the csv files that exist in s3 folder(2021-02-15). I tried the following, but it failed. How can I do it?</p>
  <pre><code>import boto3
  
  s3 = boto3.resource('s3')
  bucket = s3.Bucket('bucket')
  key = 'product/myproject/2021-02-15/'
  objs = list(bucket.objects.filter(Prefix=key))
  for obj in objs:
      client = boto3.client('s3')
      client.download_file(bucket, obj, obj)
  </code></pre>
  <p><code>valueError: Filename must be a string</code></p>