我画了一些三角形，它们应该在墙上弹跳，但它们不会弹跳，它们不能笔直，它们会在几秒钟后显示错误消息。
当我让三角形仅以十字形移动时，三角形摇摇欲坠，并出现错误消息。
import turtle
import random
def draw_sq(t,distance=400):#Draw a box
t.penup()
t.goto(-200,200)
t.pendown()
t.forward(distance)
t.right(90)
t.forward(distance)
t.right(90)
t.forward(distance)
t.right(90)
t.forward(distance)
t.penup()
t.goto(0,0)
t.pendown()
def add_tri():
global l_tri
t=turtle.Turtle()
t.shape("triangle")
x=-200
y=random.randint(-200,200)
t.penup()
t.goto(x,y)
t.setheading(random.randint(-89,89))
# make triangle and start
l_tri.append(t)# add a triangle to list
def successMan():#write word succes
global playing
if playing==True:
t.write("success")
def turn_right():
global right
right = True
def turn_left():
global left
left = True
def turn_up():
global up
up = True
def turn_down():
global down
down = True
def _turn_right():
global right
right = False
def _turn_left():
global left
left = False
def _turn_up():
global up
up = False
def _turn_down():
global down
down = False
def is_touch(x,y,triangle,threshold=20):
global playing
if((x-triangle.position()[0])**2+(y-triangle.position()[1])**2<=threshold**2):
playing=False#if triangle touches the turtle make playing False
def timer_go():
global heading
global l_tri
global t
global playing
global up
global left
global down
global right# heading is where turtle heads
if up:
if right:
heading=45
elif left:
heading=135
elif down:
heading = heading
else:
heading=90
if down:
if right:
heading=315
elif left:
heading=225
elif up:
pass
else:
heading = 270
if left:
if right:
heading = heading
elif up:
pass
elif down:
pass
else:
heading = 180
if right:
if left:
pass
elif up:
pass
elif down:
pass
else:
heading = 0
t.setheading(heading)
t.forward(10)
# turtle controller
for i in range(3):#triangles move
if (l_tri[i].position()[0]<-200):
l_tri[i].setheading(180-l_tri[i].heading())
l_tri[i].forward(10)
if (l_tri[i].position()[0]>200):
l_tri[i].setheading(180-l_tri[i].heading())
l_tri[i].forward(10)
if (l_tri[i].position()[1]<-200):
l_tri[i].setheading(-l_tri[i].heading())
l_tri[i].forward(10)
if (l_tri[i].position()[1]>200):
l_tri[i].setheading(-l_tri[i].heading())
l_tri[i].forward(10)#triangle bounces on the wall
l_tri[i].forward(10)
is_touch(t.position()[0],t.position()[1],l_tri[i],threshold=20)
# check triangle and turtle
if (playing==False):
t.write("FAIL")
#Fail
up = False
down = False
right = False
left = False
playing = True
heading = 0
l_tri = []
t = turtle.Turtle()
t.shape('turtle')
t.speed(0)
draw_sq(t)
screen = t.screen
screen.onkeypress(turn_right, 'Right')
screen.onkeypress(turn_left, 'Left')
screen.onkeypress(turn_up, 'Up')
screen.onkeypress(turn_down, 'Down')
screen.onkeyrelease(_turn_right, 'Right')
screen.onkeyrelease(_turn_left, 'Left')
screen.onkeyrelease(_turn_up, 'Up')
screen.onkeyrelease(_turn_down, 'Down')
for i in range(3):
add_tri()
for i in range(1,200):
time = i*100
screen.ontimer(timer_go, time)
screen.ontimer(successMan,20000)
screen.listen()
screen.mainloop()
这应该是一款游戏，玩家在盒子中避开三角形。
答案 0 :(得分：1)
我运行它时看到错误
RecursionError: maximum recursion depth exceeded while calling a Python object
但是我看不到代码中的递归。
也许是问题
for i in range(1,200):
time = i*100
screen.ontimer(timer_go, time)
可能创建了太多功能。
您可以运行一次
screen.ontimer(timer_go, 100)
并在timer_go()
def timer_go():
# ... rest of code ...
screen.ontimer(timer_go, 100)
，它将一直重复。
即使在官方文档中，您也可以看到此方法：turtle.ontimer
答案 1 :(得分：0)
对于如何设置ontimer(timer_go, 100)，我同意@furas（+1），但是我发现您的代码还有其他问题。我在下面对其进行了重新设计，希望您发现一些有用的更改。
特定问题：您需要（重新）阅读global的一半时间才能正确使用它；您不需要重新发明turtle.distance()（例如，在is_touch()中）；您需要将playing == False与失败分开，因为您需要停止成功或失败的比赛；您只需要在一个地方指定三角形的数量：
from turtle import Screen, Turtle
from random import randint, choice
FONT = ('Arial', 16, 'normal')
def draw_square(turtle, distance=400): # Draw a box
turtle.speed('fastest')
turtle.penup()
turtle.goto(-200, 200)
turtle.pendown()
for _ in range(4):
turtle.forward(distance)
turtle.right(90)
def add_triangle():
triangle = Turtle("triangle")
triangle.penup()
triangle.goto(choice([(choice([-150, 150]), randint(-150, 150)), (randint(-150, 150), choice([-150, 150]))]))
triangle.setheading(randint(-89, 89))
# make triangle and start
triangles.append(triangle) # add a triangle to list
def successMan(): # write word success
global playing
if playing:
player.write("Success!", font=FONT)
playing = False
def turn_right():
global right
right = True
def turn_left():
global left
left = True
def turn_up():
global up
up = True
def turn_down():
global down
down = True
def _turn_right():
global right
right = False
def _turn_left():
global left
left = False
def _turn_up():
global up
up = False
def _turn_down():
global down
down = False
def is_touch(player, triangle, threshold=20):
return player.distance(triangle) < threshold
def timer_go():
global playing
heading = player.heading()
if up:
if right:
heading = 45
elif left:
heading = 135
elif down:
pass
else:
heading = 90
if down:
if right:
heading = 315
elif left:
heading = 225
elif up:
pass
else:
heading = 270
if left:
if right:
pass
elif up:
pass
elif down:
pass
else:
heading = 180
if right:
if left:
pass
elif up:
pass
elif down:
pass
else:
heading = 0
player.setheading(heading)
player.forward(10)
# turtle controller
for triangle in triangles: # triangles move
x, y = triangle.position()
if not -200 < x < 200:
triangle.setheading(180 - triangle.heading())
triangle.forward(10)
if not -200 < y < 200:
triangle.setheading(-triangle.heading())
triangle.forward(10)
triangle.forward(10)
# check triangle and turtle
if is_touch(player, triangle, threshold=20):
playing = False
player.write("FAIL!", font=FONT) # Fail
if playing:
screen.ontimer(timer_go, 100)
up = False
down = False
right = False
left = False
playing = True
triangles = []
draw_square(Turtle(visible=False))
for _ in range(3):
add_triangle()
player = Turtle('turtle')
player.speed('fastest')
screen = Screen()
screen.onkeypress(turn_right, 'Right')
screen.onkeypress(turn_left, 'Left')
screen.onkeypress(turn_up, 'Up')
screen.onkeypress(turn_down, 'Down')
screen.onkeyrelease(_turn_right, 'Right')
screen.onkeyrelease(_turn_left, 'Left')
screen.onkeyrelease(_turn_up, 'Up')
screen.onkeyrelease(_turn_down, 'Down')
screen.ontimer(successMan, 20_000)
timer_go()
screen.listen()
screen.mainloop()
我怀疑您的RecursionError是由于您的按键事件造成的，因为您的模型似乎是一次可以关闭多个按键。但是，如果键的按住时间太长，则可能导致键事件内部发生键事件，这看起来像递归。通常，您可以通过禁用键事件处理程序作为事件处理程序中的第一件事来解决此问题，完成您的工作，然后重新启用键事件处理程序。
但是，您可能还需要操作系统控制的自动按键重复逻辑来对付您。如果您发现密钥处理有问题，请考虑使用更简单的方法。