python3如何将docx转换成pdf文件

# -*- encoding:utf-8 -*-"""  author:lgh"""from win32com.client import Dispatch, constants, gencachedef doc2pdf(input, output):  w = Dispatch('Word.Application')  try:    # 打开文件    doc = w.Documents.Open(input, ReadOnly=1)    # 转换文件    doc.ExportAsFixedFormat(output, constants.wdExportFormatPDF,                Item=constants.wdExportDocumentWithMarkup, CreateBookmarks = constants.wdExportCreateHeadingBookmarks)    return True  except:    return False  finally:    w.Quit(constants.wdDoNotSaveChanges)def GenerateSupport():  gencache.EnsureModule('{00020905-0000-0000-C000-000000000046}', 0, 8, 4)def main():  input = r'xxx/xxx.docx'  output = r'xxx/xxx.pdf'  # GenerateSupport()  rc = doc2pdf(input, output)  if rc:    print('转换成功')  else:    print('转换失败')if __name__ == '__main__':  main()