运行时出现报错：ModuleNotFoundError: No module named 'cv2'，ModuleNotFoundError: No module named 'cv2'

1、运行时出现报错：ModuleNotFoundError: No module named 'cv2'

Traceback (most recent call last):
  File "<string>", line 7, in <module>
  File "D:Python39libsite-packagescached_property.py", line 36, in __get__
    value = obj.__dict__[self.func.__name__] = self.func(obj)
  File "D:Python39libsite-packagesuiautomator2\__init__.py", line 1756, in widget
    from uiautomator2.widget import Widget
  File "D:Python39libsite-packagesuiautomator2widget.py", line 16, in <module>
    import uiautomator2.image as uim
  File "D:Python39libsite-packagesuiautomator2image.py", line 15, in <module>
    import cv2
ModuleNotFoundError: No module named 'cv2'
[Finished 1.042s]

解决方法：
安装拓展库：pip install opencv-python

2、运行时出错：ModuleNotFoundError: No module named 'imutils'

Traceback (most recent call last):
  File "<string>", line 7, in <module>
  File "D:Python39libsite-packagescached_property.py", line 36, in __get__
    value = obj.__dict__[self.func.__name__] = self.func(obj)
  File "D:Python39libsite-packagesuiautomator2\__init__.py", line 1756, in widget
    from uiautomator2.widget import Widget
  File "D:Python39libsite-packagesuiautomator2widget.py", line 16, in <module>
    import uiautomator2.image as uim
  File "D:Python39libsite-packagesuiautomator2image.py", line 17, in <module>
    import imutils
ModuleNotFoundError: No module named 'imutils'

解决方法：pip install imutils

 3、运行时出错：

ModuleNotFoundError: No module named 'skimage'

解决方法：
pip install scikit-image