code: def copy_on_s3(self, src_file_name, dst_file_name, bucket_name):
          
          try:
              self.s3_client.head_bucket(Bucket=bucket_name)
          except botocore.exceptions.ClientError as e:  # pragma: no cover
              # If a client error is thrown, then check that it was a 404 error.
              # If it was a 404 error, then the bucket does not exist.
              error_code = int(e.response['Error']['Code'])
              if error_code == 404:
                  return False
  
          copy_src = {
              "Bucket": bucket_name,
              "Key": src_file_name
          }
          try:
              self.s3_client.copy(
                  CopySource=copy_src,
                  Bucket=bucket_name,
                  Key=dst_file_name
              )
              return True
          except botocore.exceptions.ClientError:  # pragma: no cover
              return False
docs: Copies src file to destination within a bucket.