code: def _read_s3_config(self):
          
          try:
              import boto3
              import botocore.exceptions
          except ImportError:
              boto3, botocore = None, None
  
          if not boto3:
              raise ValueError(
                  's3 URL specified for configuration but boto3 not installed')
          parsed = parse.urlparse(self._file_path)
          try:
              response = boto3.client(
                  's3', endpoint_url=os.environ.get('S3_ENDPOINT')).get_object(
                      Bucket=parsed.netloc, Key=parsed.path.lstrip('/'))
          except botocore.exceptions.ClientError as e:
              raise ValueError(
                  'Failed to download configuration from S3: {}'.format(e))
          return response['Body'].read().decode('utf-8')
docs: Read in the value of the configuration file in Amazon S3.
  
          :rtype: str
          :raises: ValueError