How to install a lower version of opencv-python?

[mrwangxinqwe]

I want to install opencv-python version 3.3.1.11 or lower, what should I do? I tried to download the zip package, but it did not go well, executing python. \setup.py install did not install successfully, what should I do?

[wuyiulin]

You need to downgrade your Python version to match lower OpenCV version.

[asmorkalov]

Most probably current OpenCV version cannot be build with Python 3.3 or lower. I was able to build it with default python 3.5.x in Ubuntu 16.04, but it requires some hacks.