clear directory

delete_dir.py

def file_clear(self, dir):
    retry = True
    while retry:
        try:
            retry = False
            if (os.name == "nt"):
                try:
                    shutil.rmtree(dir)
                except exceptions.WindowsError, e:
                    if e.winerror == 5: # No write permission
                        win32api.SetFileAttributes(dir, win32con.FILE_ATTRIBUTE_NORMAL)
                        retry = True
            else:
                shutil.rmtree(dir)
            if not os.path.exists(dir):
                os.makedirs(dir)
        except Exception:
            print(traceback.format_exc())