How can I read the RGB value of a given pixel in Python?
Question: If I open an image with `open("image.jpg")`, how can I get the RGB values of a
pixel, if I have the coordinates of the pixel?

Then how can I do the reverse of this? Starting with a blank graphic, 'write'
a pixel with a certain RGB value?

It would be so much better if I didn't have to download any additional
libraries.


Answer: It's probably best to use the [Python Image
Library](http://www.pythonware.com/products/pil/) to do this which I'm afraid
is a separate download.

The easiest way to do what you want is via the [load() method on the Image
object](http://effbot.org/imagingbook/image.htm) which returns a pixel access
object which you can manipulate like an array:

    
    
    from PIL import Image
    im = Image.open("dead_parrot.jpg") #Can be many different formats.
    pix = im.load()
    print im.size #Get the width and hight of the image for iterating over
    print pix[x,y] #Get the RGBA Value of the a pixel of an image
    pix[x,y] = value # Set the RGBA Value of the image (tuple)
    

Alternatively, look at
[ImageDraw](http://effbot.org/imagingbook/imagedraw.htm) which gives a much
richer API for creating images.

