I know that I could pip install opencv-python which installs opencv3, but is there a separate command or name for opencv specific version such as 2.4.9?
pip install opencv-python
The following command line pip install opencv-python==3.4.2.16 works properly. Use one of the versions presented to you. May be:
pip install opencv-python==3.4.2.16
3.1.0.5, 3.2.0.6, 3.2.0.7, 3.2.0.8, 3.3.0.9, 3.3.0.10, 3.3.1.11, or 3.4.0.12, etc.
To make sure, you can see my screenshot.screenshot