Python如何在循环中证明布尔表达式并在单击按钮时取消循环

Python如何在循环中证明布尔表达式并在单击按钮时取消循环,python,loops,boolean,qpushbutton,Python,Loops,Boolean,Qpushbutton,您好,我有一个带有函数“startAutomation”的Python程序,在这个函数中我有一个循环: for i,j in zip(int_datadelta, int_timedelta): Att1.SetAttenuation(i) # Set attenuation print('Set Attenuation: ',i) lcd.display(i) time.sleep(j) 我有4个按钮“开始”、“停止”、“暂停”和“继续”。我可以用“开始”按钮启动“start

您好,我有一个带有函数“startAutomation”的Python程序,在这个函数中我有一个循环:

for i,j in zip(int_datadelta, int_timedelta):
  Att1.SetAttenuation(i) # Set attenuation
  print('Set Attenuation: ',i)
  lcd.display(i)
  time.sleep(j)
我有4个按钮“开始”、“停止”、“暂停”和“继续”。我可以用“开始”按钮启动“startAutomation”功能,但其他按钮无法工作。我需要一些东西来检查循环(布尔值),如果单击“停止”,循环应该停止;单击“暂停”时,只要单击“继续”按钮,循环就应暂停;单击“停止”时,循环应中止。 这是我目前的代码:

# start button
def startAutomation(self, lcd, browse_le, rssi_le, add_le, *btns):
  int_timedelta =[]
  int_datadelta =[]
    for i,j in zip(int_datadelta, int_timedelta):
      Att1.SetAttenuation(i) # Set attenuation
      print('Set Attenuation: ',i)
      lcd.display(i)
      time.sleep(j)

def parsed():    
  btn3 = QtWidgets.QPushButton('Start')
  btn4 = QtWidgets.QPushButton('Stop')
  btn10 = QtWidgets.QPushButton('Pause')
  btn11 = QtWidgets.QPushButton('Continue')
  btn3.clicked.connect(functools.partial(self.startAutomation, lcd, le, le4, le5, rbtn, rbtn2, rbtn3))
  btn4.clicked.connect(functools.partial(self.stopAutomation))
  btn10.clicked.connect(functools.partial(self.pauseAutomation))
  btn11.clicked.connect(functools.partial(self.continueAutomation))
  hbox3.addWidget(btn3)
  hbox3.addWidget(btn4)
  hbox3.addWidget(btn10)
  hbox3.addWidget(btn11)      
  ...
  return vbox

# stop button
def stopAutomation(self):
    print ("Stop")

# pause button
def pauseAutomation(self):
  print ("Pause")

# continue button
def continueAutomation(self):
    print ("Continue")

我尝试了几件带有while循环的事情,但都没能成功。如果有人能帮忙,我们会很高兴的。

您可以创建一个函数,用于设置并返回一个包含上次按下按钮字符串的变量,并对该变量的值执行操作

def lastPressed(self, what, last_pressed):
    if what == 'set':
        self.last_pressed = last_pressed
    elif what == 'get':
        return self.last_pressed
# start button
def startAutomation(self, lcd, browse_le, rssi_le, add_le, *btns):
    self.lastPressed('set', "Start")
    int_timedelta =[]
    int_datadelta =[]
        for i,j in zip(int_datadelta, int_timedelta):
            last_pressed = self.lastPressed('get', None)
            if  last_pressed == 'Start':
                Att1.SetAttenuation(i) # Set attenuation
                print('Set Attenuation: ',i)
                lcd.display(i)
                time.sleep(j)
            elif  last_pressed == 'Stop':
                ...
            elif  last_pressed == 'Pause':
                ...
            elif  last_pressed == 'Continue':
                ...
def parsed():    
    btn3 = QtWidgets.QPushButton('Start')
    btn4 = QtWidgets.QPushButton('Stop')
    btn10 = QtWidgets.QPushButton('Pause')
    btn11 = QtWidgets.QPushButton('Continue')
    btn3.clicked.connect(functools.partial(self.startAutomation, lcd, le, le4, le5, rbtn, rbtn2, rbtn3))
    btn4.clicked.connect(functools.partial(self.stopAutomation))
    btn10.clicked.connect(functools.partial(self.pauseAutomation))
    btn11.clicked.connect(functools.partial(self.continueAutomation))
    hbox3.addWidget(btn3)
    hbox3.addWidget(btn4)
    hbox3.addWidget(btn10)
    hbox3.addWidget(btn11)      
    ...
    return vbox
# stop button
def stopAutomation(self):
    self.lastPressed ('set', "Stop")

# pause button
def pauseAutomation(self):
    self.lastPressed ('set', "Pause")

# continue button
def continueAutomation(self):
    self.last_pressed ('set', "Continue")

请注意,您应该始终使用4个空格进行缩进,这样读起来更清晰。startAutomation中的*BTN是您的“停止”、“暂停”、“继续”按钮吗?你的代码使用了我们看不到的东西嘿,利奥,非常感谢!我也试着实现“暂停”和“继续”功能,但它不起作用。我将发布循环和我所做的事情。也许你知道缺少什么或者如何实现它?我会喜欢它。@Rafa如果为True,你只需要在while循环中添加一行:last_pressed=self.lastppressed('get',None)ti.sleep(1)如果last_pressed='Continue':break