Do you know any good tutorial on designing EEG experiments with PsychoPy?
A collection of classic EEG experiments implemented in Python and Jupyter notebooks. 
Currently, all experiments are implemented for the Muse EEG device and using psychopy lib for stimulus presentation. 
Classification is made offline though. But I'll post very soon an online tutorial: 
https://github.com/NeuroTechX/eeg-notebooks/tree/master/notebooks