Windows Powershell未退出使用CtrlC的脚本

Question

所以我在Windows上运行python3.4脚本，当我运行一个特定的脚本时，我有一个无限循环（虽然是True:），但是当我试图用Ctrl-C退出脚本时，它不会退出脚本。它打印键盘中断，好像它已经退出了，但是只留下闪烁的光标，不让我输入，所以我不得不用红色的X退出

import serial 
import time
import pyfirmata 
#from pyfirmata import Arduino, util, PWM

board = pyfirmata.Arduino('COM4', baudrate = 9600, timeout = 5)
time.sleep(2)       #sleep in units of sec

it = pyfirmata.util.Iterator(board)
it.start()


digital1 = board.get_pin('d:5:p')
digital2 = board.get_pin('d:6:p')
digital3 = board.get_pin('d:10:p')
digital4 = board.get_pin('d:11:p')  
digital = (digital1, digital2, digital3, digital4)

distObject = 1.5         #start warning at 4 inches away from objects (arbitrary)
forceGraspL = 0
forceGraspR = 0
maxForceL = 60      
maxForceR = 60
motorMaxForceL = maxForceL / 2
motorMaxForceR = maxForceR / 2

while True:
    left = 0
    right = 0       
    leftMid = 0
    rightMid = 0    
    distPerc = 0
    MOTORS = (left, right, leftMid, rightMid)


    if (distObject != 0 and distObject < 4 and forceGraspL == 0 and forceGraspR == 0):
        left = 0.9
        distPerc = round(distObject / 4.0 * 100)


    elif (forceGraspL != 0 or forceGraspR !=0):
        if (forceGraspL < motorMaxForceL and forceGraspR < motorMaxForceR):
            left = forceGraspL / motorMaxForceL
            right = forceGraspR / motorMaxForceR    

        elif (forceGraspL < maxForceL and forceGraspR < motorMaxForceR):
            left = 1
            leftMid = (forceGraspL - motorMaxForceL)/ motorMaxForceL
            right = forceGraspR / motorMaxForceR
        elif (forceGraspL < motorMaxForceL and forceGraspR < maxForceR):
            left = forceGraspL / motorMaxForceL
            right = 1  
            rightMid = (forceGraspR - motorMaxForceR)/ motorMaxForceR
        elif (forceGraspL < maxForceL and forceGraspR < maxForceR):
            left = 1
            leftMid = (forceGraspL - motorMaxForceL)/ motorMaxForceL
            right = 1  
            rightMid = (forceGraspR - motorMaxForceR)/ motorMaxForceR
        else:
            left = 1
            leftMid = 1
            rightMid = 1 
            right = 1

        if (distPerc < 100 and distPerc > 0):
            for pin in range(1, length(digital)):
                digital[pin].write(MOTORS(pin))
            time.sleep(.5)
            for pin in range(1, length(digital)):
                digital[pin].write(0)
            time.sleep(.5)

        else:
            for pin in range(1, length(digital)):
                digital[pin].write(MOTORS(pin))

对于我的脚本中可能导致此问题的任何建议，我们将不胜感激。我可以看出问题出在这个脚本中，因为我尝试过其他具有无限循环的脚本，而Ctrl-C也适用于这些脚本。在

Answer 1

我在源网页上发布的问题中找到了答案：

https://github.com/tino/pyFirmata

这是一个存在于原始代码中的bug，来自这个代码序列（我在上面的代码中遗漏了这个错误，很抱歉！）公司名称：

it = pyfirmata.util.Iterator(board)
it.start()

但是，您不能删除此代码，否则串行缓冲区将过载。在