import os
import os.path
import win32com
import win32com.client
import time
def ppt2pptx(file):
	powerpoint = win32com.client.Dispatch('PowerPoint.Application')
	win32com.client.gencache.EnsureDispatch('PowerPoint.Application')
	powerpoint.Visible = 1
	ppt = powerpoint.Presentations.Open(file)
	ppt.SaveAs(file[:-4]+'.pptx')
	powerpoint.Quit()
path = 'C:\\Users\\cyy\\Desktop\\ppt\\王克金电子类6章\\'
for subPath in os.listdir(path):
	s = os.path.join(path,subPath)
	if (s.endswith('.ppt')):
		print(s)
		ppt2pptx(s)