我遇到了这个 opencv 问题：
下载时提示“已经满意”
当我想使用它时，我收到“ModuleNotFoundError: No module named 'cv2'”
可能是什么问题？
pi@raspberrypi:~ $ sudo pip3 install opencv-python
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: opencv-python in /usr/local/lib/python3.7/dist-packages (4.5.1.48)
Requirement already satisfied: numpy>=1.14.5 in /usr/lib/python3/dist-packages (from opencv-python) (1.16.2)
pi@raspberrypi:~ $ python
Python 3.8.4 (default, Sep 16 2020, 00:40:58)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'cv2'
>>> import cv
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'cv'
>>>
KeyboardInterrupt
>>>