首先，我有Q设置为停止功能，为我的车，但我想使它，使汽车只移动时，一个关键是按下。例如，当我按W时，汽车向前行驶，但我必须使用Q来停止汽车。我想让它这样，我必须按住W键才能让车前进，当我松开W键时，我想让车停下来。
作为学校的一个项目，我已经在这方面工作了一段时间，但我一无所获，因为我不知道在谷歌上搜索什么，或者没有关于这个主题的信息。所以我来这里看看有没有人能帮我。提前感谢任何花时间帮助我解决问题的人。
这是我的代码。我不在乎你是否完全改变它来实现我想要的，只要它在我的场景中仍然有效。如果你需要更多的信息，请随时在评论中问我。

• 即使这是一个学校项目，我会把我的报告，我不得不在这里张贴这一点，谁找到一个修复的人将获得信贷的帮助。：）

import RPi.GPIO as io
io.setmode(io.BCM)
import time, sys, tty, termios
from termcolor import colored, cprint

motor1_in1_pin = 4
motor1_in2_pin = 17
io.setup(motor1_in1_pin, io.OUT)
io.setup(motor1_in2_pin, io.OUT)

motor2_in1_pin = 24
motor2_in2_pin = 25
motor2_in3_pin = 22
io.setup(motor2_in1_pin, io.OUT)
io.setup(motor2_in2_pin, io.OUT)
io.setup(motor2_in3_pin, io.OUT)

io.setup(18, io.OUT)
io.output(18, False)

io.setup(23, io.OUT)
io.output(23, False)

io.setup(27, io.OUT)
io.output(27, False)

def getch():
    fd = sys.stdin.fileno()
    old_settings = termios.tcgetattr(fd)
    try:
        tty.setraw(sys.stdin.fileno())
        ch = sys.stdin.read(1)
    finally:
        termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
    return ch



def motor1_forward():
    io.output(motor1_in1_pin, True)
    io.output(motor1_in2_pin, False)

def motor1_reverse():
    io.output(motor1_in1_pin, False)
    io.output(motor1_in2_pin, True)

def motor1_stop():
    io.output(motor1_in1_pin, False)
    io.output(motor1_in2_pin, False)

def motor2_forward():
    io.output(motor2_in1_pin, True)
    io.output(motor2_in2_pin, False)
    io.output(motor2_in3_pin, False)

def motor2_reverse():
    io.output(motor2_in1_pin, False)
    io.output(motor2_in2_pin, True)
    io.output(motor2_in3_pin, True)

def motor2_stop():
    io.output(motor2_in1_pin, False)
    io.output(motor2_in2_pin, False)
    io.output(motor2_in3_pin, False)

def toggleLights():

    global lightStatus

    if(lightStatus == False):
        io.output(18, True)
        io.output(23, True)
        lightStatus = True
    else:
        io.output(18, False)
        io.output(23, False)
        lightStatus = False


def toggleSteering(direction):

    global wheelStatus

    if(direction == "right"):
        if(wheelStatus == "centre"):
            motor1_forward()         
            wheelStatus = "right"
        elif(wheelStatus == "left"):
            motor1_stop()
            wheelStatus = "centre"

    if(direction == "left"):
        if(wheelStatus == "centre"):
            motor1_reverse()
            wheelStatus = "left"
        elif(wheelStatus == "right"):
            motor1_stop()
            wheelStatus = "centre"

io.output(motor1_in1_pin, False)
io.output(motor1_in2_pin, False)
io.output(motor2_in1_pin, False)
io.output(motor2_in2_pin, False)
io.output(motor2_in3_pin, False)

lightStatus2 = False
lightStatus = False
wheelStatus = "centre"

bold = "\033[1m"
reset = "\033[0;0m"
cprint("Jacksons Awesome Rc car Program", 'blue')
print " " +bold + "w/s:" +reset + " Acceleration"
print " " +bold + "a/d:" +reset + " Steering"
print " " +bold + "q:" +reset + " Brake"
print("l: lights")
print("p: Dishwasher")


while True:
    char = getch()  
    if(char == "w"):
        motor2_forward()

    if(char == "q"):
        motor2_stop()

    if(char == "s"):
        motor2_reverse()

    if(char == "q"):
        motor2_stop()

    if(char == "a"):
        toggleSteering("left")

    if(char == "d"):
        toggleSteering("right")

    if(char == "l"):
        toggleLights()

    if(char == "o"):
        cPrint("hi", 'red')

    if(char == "p"):
        print " " +bold + "Dishwasher is a mechanical device for cleaning dishes and eating-utensils. Dishwashers can be found in restaurants and private homes" +reset + " "

    if(char == "x"):
        cprint("Program Ended", 'red')
        break

    char = ""



io.cleanup()