pyosf | pure python library for simple sync

It's better to create a virtual environment. Can you try the following command lines in your terminal?:

conda create -n psychopy python=3.6 anaconda # it creates a virtual env named psychopy

source activate psychopy # it activates this virtual environment

pip install psychopy # it installs psychopy lib in the virtual environment.

Then, to try the used-case here again, type:

python # it opens python

>>> from psychopy import visual, core, gui, event

It should work.