finally:
        try:
            browser.save_screenshot(screen_file_name)
            browser.close()
            end = datetime.datetime.now()
            str_end = end.strftime('%Y/%m/%d %H:%M:%S')
            str_log = str_start + ";" + str_err + ";" + str_end + "\n"
        except Exception as e:
            print (e)
            input('err happend') <-- тут не смущает?
        finally:
##            input ('try logging')
            f = open(log_file_name, 'at')
            f.write(str_log)
            f.close()