def upload_datafile(self, project_owner, project_id, file_obj,
                        chunk_size=CHUNK_SIZE, force_chunked=False):
        """
        Upload datafile to a project. The file must be a supported format or a
        zip file containing supported formats.
        To see the formats we support, go to this URL:
        http://help.amigocloud.com/hc/en-us/articles/202413410-Supported-Format
        """

        simple_upload_url = 'users/%s/projects/%s/datasets/upload' % (
            project_owner, project_id
        )
        chunked_upload_url = 'users/%s/projects/%s/datasets/chunked_upload' % (
            project_owner, project_id
        )

        return self.upload_file(simple_upload_url, chunked_upload_url,
                                file_obj, chunk_size=chunk_size,
                                force_chunked=force_chunked)