利用pyautogui处理IE下载文件另存为

def download_file(file_name):
    '''IE下载，提示要打开或保存。。。，这里是另存为'''
    pyperclip.copy(file_name)
    time.sleep(1)
    # 从ie界面切换到下载提示
    pyautogui.press('f6')
    time.sleep(0.5)
    pyautogui.press('tab')
    time.sleep(0.5)
    pyautogui.press('down')
    time.sleep(0.5)
    pyautogui.press('down')
    time.sleep(0.5)
    pyautogui.press('enter')
    time.sleep(0.5)
    pyautogui.hotkey('ctrl', 'v')
    time.sleep(0.5)
    pyautogui.hotkey('alt', 's')
    time.sleep(0.5)