code: def datasets_upload_file(self, file_name, content_length, last_modified_date_utc, **kwargs):  # noqa: E501
          
          kwargs['_return_http_data_only'] = True
          if kwargs.get('async_req'):
              return self.datasets_upload_file_with_http_info(file_name, content_length, last_modified_date_utc, **kwargs)  # noqa: E501
          else:
              (data) = self.datasets_upload_file_with_http_info(file_name, content_length, last_modified_date_utc, **kwargs)  # noqa: E501
              return data
docs: Get URL and token to start uploading a data file  # noqa: E501
  
          This method makes a synchronous HTTP request by default. To make an
          asynchronous HTTP request, please pass async_req=True
          >>> thread = api.datasets_upload_file(file_name, content_length, last_modified_date_utc, async_req=True)
          >>> result = thread.get()
  
          :param async_req bool
          :param str file_name: Dataset file name (required)
          :param int content_length: Content length of file in bytes (required)
          :param int last_modified_date_utc: Last modified date of file in milliseconds since epoch in UTC (required)
          :return: Result
                   If the method is called asynchronously,
                   returns the request thread.