word文档转换为txt-python

__author__ = 'fremcode@gmail.com'  
# -*- coding: utf-8 -*-  
import os  
import sys  
import fnmatch  
import win32com.client  
  
PATH = os.path.abspath(os.path.dirname(sys.argv[0]))  
PATH_DATA = os.path.abspath(os.path.dirname(sys.argv[0]))+"data"  
  
#主要执行函数  
def main():  
    wordapp = win32com.client.gencache.EnsureDispatch("Word.Application")  
    try:  
        for root, dirs,files in os.walk(PATH_DATA):  
            for _dir in dirs:  
                pass  
            for _file in files:  
                if not fnmatch.fnmatch(_file,'*.doc'):  
                    continue  
                word_file = os.path.join(root, _file)  
                wordapp.Documents.Open(word_file)  
                docastxt = word_file[:-3] +'txt'  
                wordapp.ActiveDocument.SaveAs(docastxt,FileFormat = win32com.client.constants.wdFormatText)  
                wordapp.ActiveDocument.Close()  
    finally:  
        wordapp.Quit()  
    print "well done!"  
  
if __name__ == '__main__':  
    main()