Python 如何显示一个类中连续计算的函数值？

我希望程序连续运行，并在管脚上检测到信号梯度后立即从方法（func1-func4）输出值

这只是一个测试代码，用来理解我如何访问这些值，因为我写了一个“程序”，它的表面显示了一台机器的不间断值，我只使用全局变量，我不想在这里发布，因为这很尴尬。。。 我想去掉所有的全局变量

一个树莓pi连接到机器，我用它通过gpio截获4个信号

cavity = 2
count = 0
scrap = 0
uptime = datetime.timedelta(0)
downtime = datetime.timedelta(0)

def func1(channel):
    if GPIO.input(7) == 0:
        while True:
            uptime = uptime + datetime.timedelta(0,1)
            time.sleep(1)
            if GPIO.input(7) == 1 or GPIO.input(37) == 0:
                break

def func2(channel):
    scrap = scrap + cavity

def func3(channel):
    count = count + cavity

def func4(channel):
    if GPIO.input(37) == 0:
        while True:
            downtime = downtime + datetime.timedelta(0,1)
            if GPIO.inpu(37) == 1:
                break

GPIO.add_event_detect(7, GPIO.RISING, callback = func1, bouncetime = 100)           #Run
GPIO.add_event_detect(29, GPIO.RISING, callback = func2, bouncetime = 100)          #Scrap
GPIO.add_event_detect(13, GPIO.RISING, callback = func3, bouncetime = 100)          #Count
GPIO.add_event_detect(37, GPIO.RISING, callback = func4, bouncetime = 100)          #Alarm

class Output(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
        self.show()

    def show(self):
        print('ich werde aufgerufen')
        while True:
            print(uptime)
            print(scrap)
            print(count)
            print(downtime)
            print('############################')
            time.sleep(5)


thread2 = Output()
thread2.start()

---

只输出零这是意料之中的，但我如何访问变量，以便在信号检测时值增加

您的函数只是创建自己的局部变量，因此全局变量不会改变

试试这个：

def func1(channel):
    global uptime
    if GPIO.input(7) == 0:
        while True:
            uptime = uptime + datetime.timedelta(0,1)
            time.sleep(1)
            if GPIO.input(7) == 1 or GPIO.input(37) == 0:
                break

def func2(channel):
    global scrap 
    scrap = scrap + cavity

def func3(channel):
    global count
    count = count + cavity

def func4(channel):
    global downtime 
    if GPIO.input(37) == 0:
        while True:
            downtime = downtime + datetime.timedelta(0,1)
            if GPIO.inpu(37) == 1:
                break

---

您的代码编写为两个类：

class Events:
    def __init__(self):
        GPIO.add_event_detect(7, GPIO.RISING, callback = self.func1, bouncetime = 100)           #Run
        GPIO.add_event_detect(29, GPIO.RISING, callback = self.func2, bouncetime = 100)          #Scrap
        GPIO.add_event_detect(13, GPIO.RISING, callback = self.func3, bouncetime = 100)          #Count
        GPIO.add_event_detect(37, GPIO.RISING, callback = self.func4, bouncetime = 100)          #Alarm

        self.cavity = 2
        self.count = 0
        self.scrap = 0
        self.uptime = datetime.timedelta(0)
        self.downtime = datetime.timedelta(0)

    def func1(self, channel):
        if GPIO.input(7) == 0:
            while True:
                self.uptime = self.uptime + datetime.timedelta(0,1)
                time.sleep(1)
                if GPIO.input(7) == 1 or GPIO.input(37) == 0:
                    break

    def func2(self, channel):
        self.scrap = self.scrap + cavity

    def func3(self, channel):
        self.count = self.count + cavity

    def func4(self, channel):
        if GPIO.input(37) == 0:
            while True:
                self.downtime = self.downtime + datetime.timedelta(0,1)
                if GPIO.inpu(37) == 1:
                    break


class Output(threading.Thread):
    def __init__(self, events):
        threading.Thread.__init__(self)
        self.events = events
        self.show()

    def show(self):
        print('ich werde aufgerufen')
        while True:
            print(self.events.uptime)
            print(self.events.scrap)
            print(self.events.count)
            print(self.events.downtime)
            print('############################')
            time.sleep(5)


events = Events()
thread2 = Output(events)
thread2.start()

---

您的每个函数都需要将它们写入的变量声明为

global

？我经常阅读不应该使用的全局变量。我知道我可以用global解决这个问题，但我也可以用其他方法解决它吗？是的，制作另一个类，它将上述所有内容结合起来

类输出

。你能给我举个例子吗？