consumer.py 文件源码

def _convert(self, command_path, input_path, settings=[],
                 prefix='', fileformat='png'):
        if prefix:
            prefix = '{}-'.format(prefix)

        output_path = path.join(
            self.dest_pages,
            '{}%04d.{}'.format(prefix, fileformat)
        )
        exit_code = subprocess.Popen(
            (command_path, *settings, input_path, output_path),
            stdout=subprocess.PIPE, stderr=subprocess.DEVNULL
        ).wait()

        if exit_code != 0:
            raise ProcessingError(
                'Was unable to convert document to {}s ({}).'.format(fileformat,
                                                                     exit_code)
            )

        return glob.glob(path.join(
            self.dest_pages, '{}[0-9][0-9][0-9][0-9].{}'.format(prefix,
                                                                fileformat)
        ))