Randomising position of an object

[farshizzo]

If you are storing all these cubes in a list, then you can use the random.choice() function to get a random cube from the list. Example code:

import random

# List containing all cube objects
cubeList = [...]

# Select a random cube from the list
randomCube = random.choice(cubeList)

Now you can have the cube loom at the user.

[ptjt255]

Thanks very much for your reply, unfortunately I get an error message:

randomCube = random.choice(cubeList)
AttributeError: 'module' object has no attribute 'choice'

I suspect this has something to do with the way I have set this up?

# Add a cube
cube1 = viz.add('box.wrl')

# Positions the first row of cubes
cube1.setPosition(0,0)
cube2 = cube1.copy()
cube2.setPosition(-3,0)
cube3 = cube1.copy()
cube3.setPosition(3,0)

# Position the second row of cubes
cube4 = cube1.copy()
cube4.setPosition(0,2)
cube5 = cube1.copy()
cube5.setPosition(-3,2)
cube6 = cube1.copy()
cube6.setPosition(3,2)

# Position the third row of cubes
cube7 = cube1.copy()
cube7.setPosition(0,4)
cube8 = cube1.copy()
cube8.setPosition(-3,4)
cube9 = cube1.copy()
cube9.setPosition(3,4)

# Define speed and rotation of cubes
def mytimer(rotate):
global angle
angle = angle + (speed * viz.elapsed())
cube1.rotate(0, 5, 20, angle)
cube2.rotate(0, 5, 20, angle)
cube3.rotate(0, 5, 20, angle)
cube4.rotate(0, 5, 20, angle)
cube5.rotate(0, 5, 20, angle)
cube6.rotate(0, 5, 20, angle)
cube7.rotate(0, 5, 20, angle)
cube8.rotate(0, 5, 20, angle)
cube9.rotate(0, 5, 20, angle)

# Opens file 'response.txt' in write mode
file = open('reaction_time', 'a')

# Sets up looming characterics for cube1
backAndFourth1 = vizact.sequence([vizact.goto(0, 0, -1, 1), vizact.goto(0, 0, 0, 1)])


# Define a function that records reaction times in response to a looming cube
def SaveData():
#Data for getting values from wait conditions
d = viz.Data()
while True:
#Wait random amount of time
yield viztask.waitTime(2)
# Cube 1 looming
cube1.addAction(backAndFourth1)
#Wait for next frame to be drawn to screen
yield viztask.waitDraw(d)
# Calculate reaction time
displayTime = d.time
#Wait for keyboard reaction
yield viztask.waitKeyDown(None,d)
reactionTime = d.time - displayTime
# Create the output string
out = str(reactionTime) + '\t''\n'
# Write the string to the output file
file.write(out)
print 'Reaction time:',reactionTime

[farshizzo]

Can you post the code for the entire script that is causing this error? Also, please use the [code][/code] tags when posting code samples on the forum. This will preserve the indentation, which is essential for running Python code.