linux环境基于python语言docx转pdf

windows平台因借助win32com具有多种方法将word转为pdf，但linux环境不具备此环境，win32com包也将import失败，那该如何做呢？

# -*- coding: utf-8 -*-
"""
linux platform word to pdf
"""
import subprocess
import os
try:
    from comtypes import client
except ImportError:
    client = None 
try:
    from win32com.client import constants, gencache
except ImportError:
    constants = None
    gencache = None
def doc2pdf_linux(docPath, pdfPath):
    """
    convert a doc/docx document to pdf format (linux only, requires libreoffice)
    :param doc: path to document
    """
    cmd = 'libreoffice6.3 --headless --convert-to pdf'.split() + [docPath] + ['--outdir'] + [pdfPath]
    p = subprocess.Popen(cmd, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
    p.wait(timeout=30)
    stdout, stderr = p.communicate()
    if stderr:
        raise subprocess.SubprocessError(stderr)     
def doc2pdf(docPath, pdfPath):
    """
        convert a doc/docx document to pdf format
        :param doc: path to document
        """
    docPathTrue = os.path.abspath(docPath)  # bugfix - searching files in windows/system32
    if client is None:#判断环境，linux环境这里肯定为None
        return doc2pdf_linux(docPathTrue, pdfPath)
    word = gencache.EnsureDispatch('Word.Application')
    doc = word.Documents.Open(docPathTrue, ReadOnly=1)
    doc.ExportAsFixedFormat(pdfPath,
                            constants.wdExportFormatPDF,
                            Item=constants.wdExportDocumentWithMarkup,
                            CreateBookmarks=constants.wdExportCreateHeadingBookmarks)
    word.Quit(constants.wdDoNotSaveChanges)
if __name__ == '__main__':
    wordpath='/var/db/Report_20191206105753.docx'
    pdfpath='/var/db'
    doc2pdf(wordpath,pdfpath)