Usually the red report after import is because there is no module, use pip install cv2 to download the module, it will appear:
Could not find a version that satisfies the requirement cv2 (from versions: )
No matching distribution found for cv2
You are using pip version 18.1, however version 19.0.2 is available.
You should consider upgrading via the ‘python -m pip install –upgrade pip’ command.

At this point you need to type python -m pip install –upgrade pip
When the installation is complete, run this line “pip install opencv-python”, this line is to install the cv2 module, wait until the download is complete
To install the numpy module, you only need to pip install numpy
The summary is as follows:

python -m pip install --upgrade pip
pip install opencv-python
pip install numpy