ISI_recording.py

import random

# f = open(experiment_path + '/' + 'subject-' + str(subject_nr) + '-auxiliary.csv', 'a') # this will create an auxiliary datafile for participant (`subject_nr` is a predefined variable)
f = open(logfile, 'a') # this will append to the log file (`logfile` is a predefined variable)
f.write('ISI,\n')

for ISI in [[1900, 2000, 2100][random.randint(0, 2)] for _ in range(100)]:
    f.write(str(ISI) + ',\n')

f.close()