python3如何将docx转换成pdf文件

# -*- encoding:utf-8 -*-
"""
  author:lgh
"""

from win32com.client import Dispatch, constants, gencache

def 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()