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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def download(self, url, output_path):
 """Download file from API url and write to output path. :param url: URL of the API. :type url: str :param output_path: Path of output file, :type output_path: str """

        request_failed_message = self.tr(
            "Can't access PetaBencana API: {source}").format(
            source=url)
        downloader = FileDownloader(url, output_path)
        result, message = downloader.download()
        if not result:
            display_warning_message_box(
                self,
                self.tr('Download error'),
                self.tr(request_failed_message + '\n' + message))

        if result == QNetworkReply.OperationCanceledError:
            display_warning_message_box(
                self,
                self.tr('Download error'),
                self.tr(message))