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Python

Posted by Scott Simontacchi
Scott Simontacchi
2,071 Points

Dumb question: why do the X's not print?

Running the program before adding all the logging, the X prints, but after adding it the X doesn't print anymore (while the breadcrumbs do). What's the reason for this?

Sorry if this is obvious, I'm just not seeing it. Thanks!!

Steven Parker
Steven Parker
243,656 Points
Steven Parker
Steven Parker
243,656 Points

There are no dumb questions. But it would be sure helpful to anyone wanting to give assistance if you would include a link to the course video that you are referring to. And show any code you've written (if that's related to the issue).

1 Answer

Scott Simontacchi
Scott Simontacchi
2,071 Points
Scott Simontacchi
Scott Simontacchi
2,071 Points

Haha that makes sense! The video is on logging: https://teamtreehouse.com/library/write-better-python/buggy-logs/logging

And here is the code:

import logging
import random

logging.basicConfig(filename = 'game.log', level = logging.DEBUG)

player = {'location': None, 'path': []}
cells = [(0, 0), (0, 1), (0, 2),
         (1, 0), (1, 1), (1, 2),
         (2, 0), (2, 1), (2, 2)]

def get_locations():
    monster = random.choice(cells)
    door = random.choice(cells)
    start = random.choice(cells)

    if monster == door or monster == start or door == start:
        monster, door, start = get_locations()

    return monster, door, start


def get_moves(player):
    moves = ['LEFT', 'RIGHT', 'UP', 'DOWN']
    if player in [(0, 0), (1, 0), (2, 0)]:
        moves.remove('LEFT')
    if player in [(0, 0), (0, 1), (0, 2)]:
        moves.remove('UP')
    if player in [(0, 2), (1, 2), (2, 2)]:
        moves.remove('RIGHT')
    if player in [(2, 0), (2, 1), (2, 2)]:
        moves.remove('DOWN')
    return moves


def move_player(player, move):
    x, y = player['location']
    player['path'].append((x, y))
    if move == 'LEFT':
        player['location'] = x, y - 1
    elif move == 'UP':
        player['location'] = x - 1, y
    elif move == 'RIGHT':
        player['location'] = x, y + 1
    elif move == 'DOWN':
        player['location'] = x + 1, y
    return player


def draw_map():
    print(' _ _ _')
    tile = '|{}'
    for idx, cell in enumerate(cells):
        if idx in [0, 1, 3, 4, 6, 7]:
            if cell == player['location']:
                print(tile.format('X'), end='')
            elif cell in player['path']:
                print(tile.format('.'), end='')
            else:
                print(tile.format('_'), end='')
        else:
            if cell == player:
                print(tile.format('X|'))
            elif cell in player['path']:
                print(tile.format('.|'))
            else:
                print(tile.format('_|'))


monster, door, player['location'] = get_locations()
logging.info('monster: {}; door: {}; player: {}'.format(monster, door, player['location']))

while True:
    moves = get_moves(player['location'])
    print("Welcome to the dungeon!")
    print("You're currently in room {}".format(player['location']))

    draw_map()

    print("\nYou can move {}".format(', '.join(moves)))
    print("Enter QUIT to quit")

    move = input("> ")
    move = move.upper()

    if move == 'QUIT':
        break

    if not move in moves:
        print("\n** Walls are hard! Stop running into them! **\n")
        continue

    player = move_player(player, move)
    if player['location'] == door:
        print("\n** You escaped! **\n")
        break
    elif player['location'] == monster:
        print("\n** You got eaten! **\n")
        break
    else:
        continue

What's confusing is that draw_map() definitely draws 'X's when the player's location is the same as the cell, and we get the player's location right before the while loop, so when we draw map, it should be there. Kevin mentions in his video that he doesn't want the X there though.

Further, when I just ran this program a few times, the first time the X was there, the second time it was not, and it seems to be there about half of the time? Some console output below:

Welcome to the dungeon!
You're currently in room (1, 2)

||||
||||
|||_|

You can move LEFT, UP, DOWN
Enter QUIT to quit

Welcome to the dungeon!
You're currently in room (2, 2)

||||
||||
|||_|

You can move LEFT, UP
Enter QUIT to quit

Welcome to the dungeon!
You're currently in room (2, 0)

||||
||||
|X|||

You can move RIGHT, UP
Enter QUIT to quit

This is all really new and confusing to me, so thanks so much for the help!

All the best, Scott