海龟背景变化{python}

Question

当屏幕上出现特定数字时，我正在尝试更改背景颜色 我正在使用乌龟使数字出现在屏幕上。问题是每当数字出现在屏幕上然后颜色改变数字就会暂停。我希望颜色每 30 秒改变一次。

import turtle
import random

#font on Screen
font_setup = ("Arial", 20, "normal")
#backgoround colors 
background_colors = ["red", "blue", "green", "orange", "purple", "gold", "azure","beige", "yellow"]
wn = turtle.Screen()
#turtle for timer
counter =  turtle.Turtle()
counter.goto(-100,180)
counter.pu()
counter.ht()
#random
cc = random.randint(1,10)


#counter and the background defnition, might be the cause of the problem
counter_interval = 1000
timer = 300
f = 0 
famloop = True
def background_change():
  global f
  while famloop: 

    wn.bgcolor(background_colors[cc])

    f -= 1

def countdown():
  global timer, timer_up
  counter.clear()
  if timer <= 0:
    counter.write("Time's Up", font=font_setup)
    timer_up = True

  else:
    #background_change()
    counter.write("Timer: " + str(timer), font=font_setup)
    if timer == 290:
      wn.bgcolor(background_change())
    if timer == 280:
      wn.bgcolor(background_change())
    
    timer -= 1
    counter.getscreen().ontimer(countdown, counter_interval)

wn.ontimer(countdown, counter_interval) 

wn.listen()
wn.mainloop()

Answer 1

看起来你这里有一个无限循环：

  while famloop: 

什么会导致 famloop 变为 False？

鲍比

Answer 2

It's difficult to decode from your text and code what you're trying to do -- if the following doesn't help, please go back and rework your description of the problem you're trying to solve.

我希望每 30 秒改变一次颜色

我之前的示例的以下返工就是这样做的。扔第二个计时器，它只是关闭主倒计时以每 30 秒更改一次颜色：

from turtle import Screen, Turtle
from itertools import cycle

FONT_SETUP = ('Arial', 24, 'normal')
BACKGROUND_COLORS = ['red', 'blue', 'green', 'orange', 'purple', 'gold', 'azure', 'beige', 'yellow']
COUNTER_INTERVAL = 1000  # milliseconds
BACKGROUND_INTERVAL = 30  # seconds

color = cycle(BACKGROUND_COLORS)
timer = 300  # seconds

def countdown():
    global timer

    counter.clear()

    if timer > 0:
        if timer % BACKGROUND_INTERVAL == 0:
            screen.bgcolor(next(color))

        counter.write("Timer: " + str(timer), align='center', font=FONT_SETUP)

        timer -= 1

        screen.ontimer(countdown, COUNTER_INTERVAL)
    else:
        counter.write("Time's Up", align='center', font=FONT_SETUP)

screen = Screen()

counter = Turtle()
counter.hideturtle()
counter.penup()

countdown()

screen.mainloop()