我如何让我的代码循环，直到我按下一个按钮(乐高EV3)

Question

问题纯粹而简单。我尝试过使用while循环，重新排列代码，但所发生的一切都是程序在我按下按钮时启动，或者什么都不做。有人看到我做错了什么吗？

#!/usr/bin/env python3
from ev3dev2.motor import MoveTank, OUTPUT_B, OUTPUT_C
from ev3dev2.button import Button
from ev3dev2.sound import Sound
from time import sleep
import time
sound = Sound()
btn = Button()
tank_pair = MoveTank(OUTPUT_B, OUTPUT_C)
def movement(left_speed, right_speed, rotations):
tank_pair.on_for_rotations(left_speed, right_speed, rotations, brake=True, block=True)

while not btn.any():
movement(20,20,10)
movement(-100,0,1.5)
movement(20,20,10)
sleep(0.01)
while btn.any():
sleep(0.01)
tank_pair.off()
sound.beep()
exit()

Answer 1

您可以使用此中断主循环

pip install keyboard

然后

import keyboard
while True:
# do something
if keyboard.is_pressed("q"):
print("q pressed, ending loop")
break

Answer 2

您的缩进不正确。

from ev3dev2.motor import MoveTank, OUTPUT_B, OUTPUT_C
from ev3dev2.button import Button
from ev3dev2.sound import Sound
from time import sleep
import time
sound = Sound()
btn = Button()
tank_pair = MoveTank(OUTPUT_B, OUTPUT_C)
def movement(left_speed, right_speed, rotations):
tank_pair.on_for_rotations(left_speed, right_speed, rotations,       brake=True, block=True)

while not btn.any():
movement(20,20,10)
movement(-100,0,1.5)
movement(20,20,10)
sleep(0.01)
while btn.any():
sleep(0.01)
tank_pair.off()
sound.beep()
exit()