PyautoGUI调用locateOnScreen报错 已安装Pillow仍提示缺失问题解决

问题描述 #

使用PyAutoGUI的locateOnScreen方法定位屏幕元素时触发报错，完整报错信息如下：

Traceback (most recent call last):
  File "C:\Users\centr\PycharmProjects\phoenix\whatsapp\main.py", line 7, in <module>
    position1 = pt.locateOnScreen('whatsapp/smiley_paperclip.png')
  File "C:\Users\centr\PycharmProjects\phoenix\venv\lib\site-packages\pyautogui\_init_.py", line 175, in wrapper
    return wrappedFunction(*args, **kwargs)
  File "C:\Users\centr\PycharmProjects\phoenix\venv\lib\site-packages\pyautogui\_init_.py", line 213, in locateOnScreen
    return pyscreeze.locateOnScreen(*args, **kwargs)
  File "C:\Users\centr\PycharmProjects\phoenix\venv\lib\site-packages\pyscreeze\_init_.py", line 371, in locateOnScreen
    screenshotIm = screenshot(region=None) # the locateAll() function must handle cropping to return accurate coordinates, so don't pass a region here.
  File "C:\Users\centr\PycharmProjects\phoenix\venv\lib\site-packages\pyscreeze\_init_.py", line 143, in wrapper
    raise PyScreezeException('The Pillow package is required to use this function.')
pyscreeze.PyScreezeException: The Pillow package is required to use this function.

排查过程 #

• 执行pip install Pillow安装依赖，系统提示包已安装，但报错依然存在
• 确认问题根源为Pillow 8.3.0版本与PyAutoGUI依赖的pyscreeze组件存在兼容性冲突

解决方案 #

卸载现有高版本Pillow，重装8.0.0版本即可解决，执行命令如下：

1. 卸载现有Pillow：pip uninstall -y pillow
2. 安装指定版本：pip install pillow==8.0.0

内容的提问来源于stack exchange，提问作者GabsLeo