while當(dāng)另一只烏龜有 50 個(gè)單位時(shí)，如何使用循環(huán)停止隨機(jī)移動(dòng)的烏龜？我有一只烏龜隨機(jī)選擇一個(gè)位置并創(chuàng)建一個(gè)大點(diǎn)或洞，另一只烏龜隨機(jī)移動(dòng) 90 度轉(zhuǎn)彎并每次向前移動(dòng) 50 個(gè)單位。隨機(jī)移動(dòng)的烏龜在離開屏幕末端時(shí)停止，但是當(dāng)烏龜?shù)竭_(dá)另一只烏龜創(chuàng)建的洞時(shí)，我如何也讓烏龜停止？import randomimport turtledef turtlesClose(t1, t2): if t1.distance(t2)<50: return True else: return Falsedef isInScreen(win,turt): leftBound = -win.window_width() / 2 rightBound = win.window_width() / 2 topBound = win.window_height() / 2 bottomBound = -win.window_height() / 2 turtleX = turt.xcor() turtleY = turt.ycor() stillIn = True if turtleX > rightBound or turtleX < leftBound: stillIn = False if turtleY > topBound or turtleY < bottomBound: stillIn = False return stillIndef main(): wn = turtle.Screen() # Define your turtles here june = turtle.Turtle() july = turtle.Turtle() july.shape('turtle') july.up() july.goto(random.randrange(-250, 250, 1), random.randrange(-250, 250, 1)) july.down() july.dot(100) june.shape('turtle') while isInScreen(wn,june): coin = random.randrange(0, 2) dist = turtlesClose(july, june) if coin == 0: june.left(90) else: june.right(90) june.forward(50) if dist == 'True': breakmain()
1 回答
鴻蒙傳說
TA貢獻(xiàn)1865條經(jīng)驗(yàn) 獲得超7個(gè)贊
您的代碼的問題是以下語句：
if dist == 'True':
你不想要引號(hào)周圍True。雖然這會(huì)起作用：
if dist == True:
正確的表達(dá)方式是：
if dist is True:
或者更好：
if dist:
否則你的代碼似乎工作。下面是利用一些海龜習(xí)語和其他代碼清理的重寫：
from random import randrange, choice
from turtle import Screen, Turtle
CURSOR_SIZE = 20
def turtlesClose(t1, t2):
return t1.distance(t2) < 50
def isInScreen(window, turtle):
leftBound = -window.window_width() / 2
rightBound = window.window_width() / 2
topBound = window.window_height() / 2
bottomBound = -window.window_height() / 2
turtleX, turtleY = turtle.position()
return leftBound < turtleX < rightBound and bottomBound < turtleY < topBound
def main():
screen = Screen()
july = Turtle('circle')
july.shapesize(100 / CURSOR_SIZE)
july.up()
july.goto(randrange(-250, 250), randrange(-250, 250))
july.down()
june = Turtle('turtle')
while isInScreen(screen, june):
if turtlesClose(july, june):
break
turn = choice([june.left, june.right])
turn(90)
june.forward(50)
main()
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