"""
    CS 51 assignment: PPM Scaling

    Name: YOUR-NAME-HERE

    The goal of this assignment is to give you practice working with nested lists
    by writing a program that manipulates the entire image with multiple lines.
"""


def process(lines, rows, cols):
    # TODO:
    #  1. write the complete docstring of this function.
    #  2. implement this function as specified in the handout
    pass


def read_ppm(filename):
    # TODO:
    #  1. write the complete docstring of this function.
    #  2. implement this function as specified in the handout
    pass


def write_ppm(image, filename):
    # TODO:
    #  1. write the complete docstring of this function.
    #  2. implement this function as specified in the handout
    pass


def scale(image, row_scale, col_scale):
    # TODO:
    #  1. write the complete docstring of this function.
    #  2. implement this function as specified in the handout
    pass


# TODO:
# Add your process_ppm function here
