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Python Python Collections (2016, retired 2019) Dungeon Game Hit points

MONTRIAL HARRELL
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.a{fill-rule:evenodd;}techdegree
MONTRIAL HARRELL
Python Web Development Techdegree Student 2,150 Points
Posted by MONTRIAL HARRELL
.a{fill-rule:evenodd;}techdegree
MONTRIAL HARRELL
Python Web Development Techdegree Student 2,150 Points

Why is my movement.py code failing?

My movement.py code is failing and I can not figure out why. I have tried printing the incoming parameters and they appear to be coming in as 0 for x and -1 for y and not the actual parameters supplied. I really need help and thank you in advance.

movement.py 
# EXAMPLES:
# move((1, 1, 10), (-1, 0)) => (0, 1, 10)
# move((0, 1, 10), (-1, 0)) => (0, 1, 5)
# move((0, 9, 5), (0, 1)) => (0, 9, 0)

def move(player, direction):

    x,y,hp = player
    x1,y1 = direction

    while True:

        if x == 0 and x1 == -1:
            hp -= 5
            break
        if x == 9 and x1 == 1:
            hp -= 5
            break
        if y == 0 and y1 == -1:
            hp -= 5
            break
        if y == 9 and y1 == 1:
            hp -= 5
            break
        if x1 == -1:
            x -= 1
        if x1 == 1:
            x += 1
        if y1 == -1:
            y -=1
        if y1 == 1:
            y += 1
    return(x,y,hp)

2 Answers

Eric M
Eric M
11,546 Points
Eric M
Eric M
11,546 Points

Consider this function to be handling a single key press, it probably gets executed every game loop, which is quite often. So when a player hits a key they don't expect their character to continue in that direction until they hit a wall.

As it stands your code will not break out of the while loop until a collision occurs.

As you're using the breaks to get to your return, why not just return on your conditional branches?

def move(player, direction):
    x, y, hp = player

    #handle left collision
    if direction[0] < 0 and x == 0:
        return(x, y, hp - 5)

    #handle right collision
    if direction[0] > 0 and x == 9:
        return(x, y, hp - 5)

    #handle up collision
    if direction[1] > 0 and y == 9:
        return(x, y, hp - 5)

    #handle down collision
    if direction[1] < 0 and y == 0:
        return(x, y, hp - 5)

    #handle valid move
    return x + direction[0], y + direction[1], hp