下载库后locateOnScreen错误

Question

在尝试安装pyobjc-core之前，脚本运行良好。由于即时通讯在Windows上，因此未成功安装。 locateCenterOnScreen可以工作，除了它将引发TypeError之后看起来像

  File "C:\Users\lucie\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyscreeze\__init__.py", line 333, in locateCenterOnScreen
    return center(coords)
  File "C:\Users\lucie\AppData\Local\Programs\Python\Python37-32\lib\site-packages\pyscreeze\__init__.py", line 445, in center
    return Point(coords[0] + int(coords[2] / 2), coords[1] + int(coords[3] / 2))
TypeError: 'NoneType' object is not subscriptable