Rescale an Image using Python3.2

Rescale an Image using Python3.2

I'm working on a python code that takes an image name from the command
line, and prints its, rescaled to the user's likings, i.e., the input
python3.2 resize.py image.gif 2 3 would take image.gif and double the
width and triple the height. I've written a code for quadrupling an image:
import sys
from cImage import *
def main():
oldImage = FileImage(sys.argv[1])
width = oldImage.getWidth()
height = oldImage.getHeight()
myWin = ImageWin("Old Image", width, height)
myNewWin = ImageWin("Quadrupled Image", width*4, height*4)
newImage = EmptyImage(width*4, height*4)
for r in range(width):
for c in range(height):
pixel = oldImage.getPixel(r, c)
newImage.setPixel(4*r, 4*c, pixel)
newImage.setPixel(4*r, 4*c+1, pixel)
newImage.setPixel(4*r, 4*c+2, pixel)
newImage.setPixel(4*r, 4*c+3, pixel)
newImage.setPixel(4*r+1, 4*c, pixel)
newImage.setPixel(4*r+1, 4*c+1, pixel)
newImage.setPixel(4*r+1, 4*c+2, pixel)
newImage.setPixel(4*r+1, 4*c+3, pixel)
newImage.setPixel(4*r+2, 4*c, pixel)
newImage.setPixel(4*r+2, 4*c+1, pixel)
newImage.setPixel(4*r+2, 4*c+2, pixel)
newImage.setPixel(4*r+2, 4*c+3, pixel)
newImage.setPixel(4*r+3, 4*c, pixel)
newImage.setPixel(4*r+3, 4*c+1, pixel)
newImage.setPixel(4*r+3, 4*c+2, pixel)
newImage.setPixel(4*r+3, 4*c+3, pixel)
oldImage.draw(myWin)
newImage.draw(myNewWin)
myWin.exitOnClick()
myNewWin.exitOnClick()
main()
But I am having trouble try to figure out how to edit my code so it scales
the parameters requested. I feel that I should probably be able to
implement a for loop, but I'm having a hard time getting things to work.
Any help would be much appreciated!