[Python] Reading three or more separate values in one line in python [duplicate]

Possible Duplicate:
Reading two separate values in one line in python
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So here's my program so far:

import turtle
turtle.showturtle()
def turtle_commands():
while True :
n = 0
instructions = input().split()
i = instructions[0]
if len(instructions) > 1:
n = int(instructions[1])
if i == 'forward' :
turtle.forward(n)
elif i == 'backward' :
turtle.backward(n)
elif i == 'left' :
turtle.left(n)
elif i == 'right' :
turtle.right(n)
else :
continue
elif i == 'new' :
turtle.reset()
print("\n" * 50)
elif i == 'penup' :
turtle.penup()
elif i == 'pendown' :
turtle.pendown()
print('Control the turtle!')
turtle_interface()


But i also need to implement turtle.goto, turtle.write and turtle.color commands, which would need another string or integer variable. In what part of the code should i define these variables?

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