如何在python中不断地从屏幕的特定部分获取单词？

pip install pytesseract
pip install Pillow

import pytesseract
from PIL import ImageGrab

def get_words_from_screen(left, top, right, bottom):
    # 获取屏幕特定部分的图像
    screenshot = ImageGrab.grab(bbox=(left, top, right, bottom))
    
    # 将图像转换为灰度图像
    screenshot = screenshot.convert("L")
    
    # 使用OCR识别文本
    words = pytesseract.image_to_string(screenshot)
    
    # 返回识别到的单词
    return words

left = 100  # 左上角横坐标
top = 100  # 左上角纵坐标
right = 500  # 右下角横坐标
bottom = 300  # 右下角纵坐标

words = get_words_from_screen(left, top, right, bottom)
print(words)