stairtest.py

from psychopy import data
import random

stairs = data.MultiStairHandler(conditions=[{'label': str(size),
                                             'size': size,
                                             'startVal': 10,
                                             'stepType': 'lin',
                                             'nTrials': 20,
                                             'nUp': 1,
                                             'nDown': 1,
                                             'minVal': 1,
                                             'maxVal': 199,
                                             'stepSizes': 1}
                                            for size in range(4)],
                                nTrials=80,
                                method='random',
                                stairType='simple')
for difficulty, condition in stairs:
	stairs.addResponse(random.choice([0, 1]))

stairs.saveAsExcel(fileName='stair',
                   fileCollisionMethod='rename')