Simple Programming Question

[new_horizon]

Hi All,

Forgive my ignorance, but I am writing a program where I have a set of commands that occur for a given number of trials (for in in range (0, No_trials)).

I wish to have another event that only occurs every three trials (i.e. when i is 3, 6, 9 etc) - can anyone tell me how I would express this in Python?

Many thanks

Mark

[farshizzo]

Are you using the viztask module to run your trials? Either way, here is some code that shows how you can detect every third trial:

import viz
import viztask
viz.go()

NUM_TRIALS = 10

def runTrial():

	yield viztask.waitTime(1.0)



def runExperiment():

	for i in range(NUM_TRIALS):

		if i % 3 == 2:
			print 'Special event for every third trial'

		yield runTrial()

		print 'Finished trial',i+1

viztask.schedule( runExperiment() )