from sklearn.model_selection import KFold
def examplar_epoch_data(epochs_in, N, navg):
epo = epochs_in.copy()[range(N)]
fold_num = N // navg
if N % navg > 0: fold_num += 1
X1 = epo.get_data() # signals: n_epochs, n_channels, n_times
y1 = epo.events[:, 2]