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Jordon Crichton1,868 Points
I am not sure what I am missing. The error says I am not hurting when hitting the wall.
Our move function takes this three-part tuple player and a direction tuple that's two parts, the x to move and the y (like (-1, 0) would move to the left but not up or down).
Finish the function so that if the player is being run into a wall, their hp is reduced by 5. Don't let them go past the wall. Consider the grid to be 0-9 in both directions. Don't worry about keeping their hp above 0 either.
# 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 if direction == (-1,0): x-=1 elif direction == (1,0): x+=1 elif direction == (0,1): y+=1 elif direction == (0,-1): y-=1 elif direction == (-1,0) and x == 0: x = 0 hp -= 5 elif direction == ( 1,0) and x == 9: x = 9 hp -= 5 elif direction == (0,-1) and y == 0: y=0 hp -= 5 elif direction == (0,1) and y == 9: y=9 hp -=5 return x, y, hp
Steven Parker218,596 Points
Remember that an "if/elif" chain is efficient because it stops testing when any condition is met. And the first few tests look only at direction, so if they match, they will change a coordinate and not change the hp, even if a wall is being hit.
A few things to keep in mind while implementing this function:
- don't assume the movement will be in only one direction
- don't assume the motion will be only one step
- check for wall collisions first
- if a wall would be hit, change the hp but not the location