# Basic functions for working with images.
# For simplicity and compatibility with the underlying code,
# these functions are written using loop (i.e., NOT functional programming)
# However, you should use functional programming in all functions in HW3
# when working with these images.

def getPixels(pic):
    """ returns the RGB color values for all of the pixel in the
        given image (pic) as a 2D list of tuples.  E.g.,
            pixles = getPixels(pic)
            (r,g,b) = pixels[row][col]
        (r,g,b) will hold the red, green and blue values for the pixel
        at row "row", column "col" in the image. """
    ret = []
    for row in range(pic.height()):
        nextrow = []  # create the next row
        for col in range(pic.width()):
            p = pic.idat[row][col]
            nextrow += [(p.r, p.g, p.b)]
        ret += [nextrow]
    return ret

def setPixels(pic, colorVals):
    """ sets the pixels in pic to be equal to the color values supplied.
        input: pic: a picture
                colorVals: a 2D array of tuples specifying the rgb color
                values for each pixel in pic.  E.g.,
                    colorVals[row][col]
                is a tuple (r, g, b) containing the new red, green and blue values
                for the pixel in row "row" and column "col
    """
    for row in range(pic.height()):
        for col in range(pic.width()):
            p = pic.idat[row][col]
            (p.r, p.g, p.b) = colorVals[row][col]