Need help with a project

[mberkes]

So after a two month absense from working on this, I'm back at it, and realised I don't know what I'm doing! My code seems to be a mess with extraneous, or at least poorly written, code and the experiment doesn't work how I'd like. Here's my code:

import viz
import viztask
import random
viz.go()

viz.MainView.move(0,1.4,-13)
#add pathway to bring objects from
viz.res.addPath('C:\Users\Matyi\Desktop\2009 Experiments')
#field of view at 45 degrees
viz.fov(45)


#keep nine positions in an array
pos = [[-2.667, 0.0, -1.524],[1.51892, 0.0, -2.53492],[-0.82042, 0.0, 2.89052],[2.286, 0.0, -0.04572],[-1.17856, 0.0, -1.30302],[1.8415, 0.0, 2.06248],[-0.94996, 0.0, -2.85242],[-3.15722, 0.0, 0.82042],[-0.20828, 0.0, 0.84328]]


#add table, keep it in position, scale
table = viz.add('bluetable.wrl')
table.setPosition(0,0,0)
table.setScale(.5,.5,.5)
table.disable(viz.PICKING)

#add objects and scale
bottle = viz.add('bottle.wrl')
bottle.setScale(.5,.5,.5)
bottle.center(0,0,0)

candle = viz.add('candle.wrl')
candle.setScale(.5,.5,.5)
candle.center(0,0,0)

clamp = viz.add('clamp.wrl')
clamp.setScale(.5,.5,.5)
clamp.center(0,.5,0)
clamp.rotate(0,150,90)

lock = viz.add('lock.wrl')
lock.setScale(.5,.5,.5)
lock.center(0,0,.0)

wood = viz.add('wood.wrl')
wood.setScale(.5,.5,.5)
wood.center(0,0,0)

#make a list with the objects in it
objects = [bottle, candle, clamp, lock, wood]

#disable mouse navigation
viz.mouse(viz.OFF)



def prep():
	viz.MainScene.visible(viz.OFF)
	#vizact.onkeydown(' ', sceneOn,1)

rand_positions = []
def sceneOn(num):

	global rand_positions
	
	positions = [0,1,2,3,4,5,6,7,8]
	
	if num == 1:
		
		#set objects to 5 different random positions
		rand_positions = random.sample(positions,5)
		
		objects[0].setPosition(pos[rand_positions[0]])
		objects[1].setPosition(pos[rand_positions[1]])
		objects[2].setPosition(pos[rand_positions[2]])
		objects[3].setPosition(pos[rand_positions[3]])
		objects[4].setPosition(pos[rand_positions[4]])

		#vizact.ontimer2(3,0,sceneOff)

	elif num == 2:
		
		#choose one object to move randomly and leave others in their places
		
		#first get available positions
		diff_list = [item for item in positions if not item in rand_positions]
		rand_position = random.sample(diff_list,1)[0]
		
		#choose one of the objects
		rand_obj = random.randint(0,4)
		
		#set the randomly chosen object to the new random position
		objects[rand_obj].setPosition(pos[rand_position])
		print 'object ' + str(rand_obj) + ' moved to position ' + str(rand_position)  
		
	viz.MainScene.visible(viz.ON)
	

def sceneOff():
	
	viz.MainScene.visible(viz.OFF)
	#vizact.ontimer2(10,0,sceneOn,2)



#define the file to save subject responses
response_data = open('exp_data','a')
	
#use this; viztask is better
def experiment():
	
	while True:
		viz.MainScene.visible(viz.OFF)
		yield viztask.waitKeyDown(' ')
		yield sceneOn(1)
		viztask.waitTime(3)
		yield sceneOff()
		viztask.waitTime(10)
		yield sceneOn(2)
		d = viz.Data()
		yield viztask.waitMouseDown(viz.MOUSEBUTTON_LEFT, d)
		print str(objects), 'was selected at', d.time

viztask.schedule( experiment() ) 


#viz.callback(viz.MOUSEDOWN_EVENT,mouseclick)
#go to blank scene
#vizact.whilemousedown(viz.MOUSEBUTTON_LEFT,prep)
	

	

#input subject number at start
subject = viz.input('What is the participant number?')

If I could get some help here telling me what's unnecessary, what's good and that I should keep expanding on, that would be amazing. In particular, my problems include:

- subject number can be blank and it still accepts this, I need that to change
- data file doesn't exist; do I create a spreadsheet and it stores there, or automatically makes one with the correct code?
- pressing space now just moves an object with no timing at all or scene change
- clicking anywhere at all makes the scene blank and gives me lines saying [vizard object yada yada yada moved positions] with nothing relevant, or the object name

Thanks for your help, my complete lack of understanding with vizard is getting somewhat discouraging.