code: def complete_upload(self):
          
          xml = self.to_xml()
          return self.bucket.complete_multipart_upload(self.key_name,
                                                       self.id, xml)
docs: Complete the MultiPart Upload operation.  This method should
          be called when all parts of the file have been successfully
          uploaded to S3.
  
          :rtype: :class:`boto.s3.multipart.CompletedMultiPartUpload`
          :returns: An object representing the completed upload.