python coding: complete implementation of module

class Room(object): """ A Room represents a rectangular grid containing clean or unclean tiles.

A room has a width and a height and contains (width * height) tiles. At any particular time, each of these tiles can be either clean or unclean. """ def __init__(self, width, height): """ Initializes a rectangular room with the specified width and height. Initially, all tiles in the room have cookies on them (unclean!).

width: an integer > 0 height: an integer > 0 """ # TODO: Your code goes here def mark_tile_clean(self, pos): """ Mark the tile at position `pos` as clean. Assumes that `pos` represents a valid position inside this room.

pos: a Position object """ # TODO: Your code goes here def is_tile_clean(self, m, n): """ Return True if the tile (m, n) is clean.

Assumes that (m, n) represents a valid tile inside the room.

m: an integer n: an integer Returns: True if (m, n) is clean, False otherwise """ # TODO: Your code goes here

def get_num_tiles(self): """ Return the total number of tiles in the room.

Returns: an integer """ # TODO: Your code goes here

def get_num_clean_tiles(self): """ Return the total number of clean tiles in the room.

Returns: an integer """ # TODO: Your code goes here def get_random_position(self): """ Return a random position inside the room.

Returns: a Position object. """ # TODO: Your code goes here def is_position_in_room(self, pos): """ Return True if `pos` is inside the room.

pos: a Position object. Returns: True if `pos` is in the room, False otherwise. """ # TODO: Your code goes here