Python Terminator Error

Question

I\'m working on a Python project with a friend of mine for school. We have imported Turtle and Math. My problem is that when I use the \"Esc\" button to close the window, I

Answer 1

when I use the "Esc" button to close the window, I get an error saying "Terminator Error"

The problem is you're using while True: in an event-based world, effectively shutting out the event system and causing things to happen in non-synchronous ways. The Terminator Error occurs when the turtle screen has been closed but methods are still acting as if it's running.

One way around this is to make everything work within the event model. Below I've eliminated your while True: loop and replaced it with a function that's called whenever the player moves to a new position. And I've cleaned up lots of other stuff for efficiency and/or style:

from turtle import Turtle, Screen

IMAGES = ["right.gif", "left.gif", "face.gif", "back.gif", "tresor.gif", "mur.gif", "sol.gif"]

FONT = ('Arial', 18, 'bold')

class Stylo(Turtle):
    def __init__(self):
        Turtle.__init__(self, "mur.gif")
        self.color("white")
        self.penup()
        self.speed('fastest')

class Joueur(Turtle):
    def __init__(self):
        Turtle.__init__(self, "face.gif")
        self.color("blue")
        self.penup()
        self.speed('fastest')

    def haut(self):
        move_to_x = self.xcor()
        move_to_y = self.ycor() + 24
        self.shape("back.gif")
        if (move_to_x, move_to_y) not in murs:
            self.goto(move_to_x, move_to_y)
        scorefn()

    def bas(self):
        move_to_x = self.xcor()
        move_to_y = self.ycor() - 24
        self.shape("face.gif")
        if (move_to_x, move_to_y) not in murs:
            self.goto(move_to_x, move_to_y)
        scorefn()

    def gauche(self):
        move_to_x = self.xcor() - 24
        move_to_y = self.ycor()
        self.shape("left.gif")
        if (move_to_x, move_to_y) not in murs:
            self.goto(move_to_x, move_to_y)
        scorefn()

    def droite(self):
        move_to_x = self.xcor() + 24
        move_to_y = self.ycor()
        self.shape("right.gif")
        if (move_to_x, move_to_y) not in murs:
            self.goto(move_to_x, move_to_y)
        scorefn()

    def collision(self, other):

        return self.distance(other) < 5

class Tresor(Turtle):
    def __init__(self, x, y):
        Turtle.__init__(self, "tresor.gif")
        self.penup()
        self.speed('fastest')
        self.goto(x, y)

    def destruction(self):
        self.hideturtle()
        self.goto(2000, 2000)

NIVEAUX = [[
    "XXXXXXXXXXXXXXXXXXXXXXXXX",
    "XJ X      X             X",
    "X  X XXX  X    XXXXXXX  X",
    "X  X  TX  X          X  X",
    "X  XXXXX  X  X XXXXXXX  X",
    "X           X  X        X",
    "XXXXXXXX    X  XT X X   X",
    "X X    X XXXXXXXXXXXXXX X",
    "X X X  X X            X X",
    "X X XT X   X X   X    XTX",
    "X X XXXX X X XXXXXX X XXX",
    "X X    X X X TX     X   X",
    "X XXX XX   XXXXXXXXXXXXXX",
    "X        X X            X",
    "XXXXXXXX   XTX  X X XXX X",
    "X      X X XXX  X X XT  X",
    "X  XXX X X      X X XXXXX",
    "X XXT  X X  XXXXXXX X X X",
    "X  XXXXX X              X",
    "X          XXXXXXXXXX X X",
    "XXXXX  XXXXX            X",
    "X          X X X XX XXXXX",
    "X XXXXXXXX X XXX  X    XX",
    "X     TX   X  XT X   X  X",
    "XXXXXXXXXXXXXXXXXXXXXXXXX"]]

def setup_labyrinthe(niveau):
    for y in range(len(niveau)):
        for x in range(len(niveau[y])):
            caractere = niveau[y][x]
            ecran_x = -288 + (x * 24)
            ecran_y = 288 - (y * 24)

            if caractere == "X":
                stylo.goto(ecran_x, ecran_y)
                stylo.stamp()
                murs.append((ecran_x, ecran_y))
            elif caractere == "J":
                joueur.goto(ecran_x, ecran_y)
            elif caractere == "T":
                tresors.append(Tresor(ecran_x, ecran_y))

def scorefn():
    global score

    for tresor in tresors:
        if joueur.collision(tresor):
            tresor.destruction()
            score += 100
            # On associe les touches du clavier.
            marker.undo()
            marker.write(score, font=FONT)
            tresors.remove(tresor)

fn = Screen()
fn.bgcolor("black")
fn.title("No Escape!")
fn.setup(700, 700)

fn.tracer(False)  # turn off screen updates

for image in IMAGES:
    # On ajoute l'image a notre labyrinthe.
    fn.addshape(image)

stylo = Stylo()
joueur = Joueur()

tresors = []
murs = []

setup_labyrinthe(NIVEAUX[0])

fn.onkeypress(joueur.gauche, "Left")
fn.onkeypress(joueur.droite, "Right")
fn.onkeypress(joueur.haut, "Up")
fn.onkeypress(joueur.bas, "Down")
fn.onkey(fn.bye, "Escape")
fn.listen()

score = 0

marker = Turtle(visible=False)
marker.penup()
marker.color('green')
marker.goto(180, 315)
marker.write(score, font=FONT)

fn.tracer(True)  # turn screen updates back on

fn.mainloop()

My next warning is that turtles wander a floating point plane. Comparing wall positions in a list directly against turtle positions might not always work (ponder 315.0 vs. 315.00003). Like treasures, consider using turtle's distance() method (which works with positions as well as other turtles) and a fudge factor to determine if you will be too close to a wall instead of exactly at one.