import os
import win32com.client

excel = win32com.client.Dispatch("Excel.Application")
excel.DisplayAlerts = False

path = os.getcwd() + "\\Excel"

#def convert(path):
for file in filter(lambda x: x.endswith(".xls"), os.listdir(path)):
    print(file)
    fullname = path + "\\" + file
    excel.Workbooks.Open(fullname)
    excel.ActiveWorkbook.SaveAs(Filename=fullname + "x", ConflictResolution=True)
    excel.ActiveWorkbook.Close(True)