我有一个程序,它的目标是从传感器获取输入,然后对这些传感器的输入进行操作,这些规则来自于在类中存储和调用的一些预定义规则。我在将传感器定义为的变量传递到rules类时遇到问题。在这里我得到了“Rules object has not attribute.Rules\u temperature”的错误。我的代码如下:
class myInterfaceKit():
__interfaceKit = None
def __init__(self ):
try:
self.__interfaceKit = InterfaceKit()
except RuntimeError as e:
print("Runtime Exception: %s" % e.details)
print("Exiting....")
exit(1)
def open(self):
try:
self.__interfaceKit.openPhidget()
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
def getInterfaceKit(self):
return self.__interfaceKit
def getSensor(self, sensor):
return self.__interfaceKit.getSensorValue(sensor)
class sensors():
__sound = 0
__temperature = 0
__light = 0
__motion = 0
__dbName = ""
__interfaceKit = None
__connection = None
__rules = None
def __init__(self, theInterfaceKit, dbName):
self.__sound = 0
self.__temperature=0
self.__light=0
self.__motion=0
self.__timeStamp=time.time()
self.__strTimeStamp=datetime.datetime.fromtimestamp(self.__timeStamp).strftime('%Y-%m-%d %H:%M:%S')
self.__dbName = dbName
self.__interfaceKit = theInterfaceKit
self.__connection = sqlite3.connect('testing1.db', check_same_thread=False) ######
def interfaceKitAttached(self, e):
attached = e.device
print("InterfaceKit %i Attached!" % (attached.getSerialNum()))
self.__interfaceKit.getInterfaceKit().setSensorChangeTrigger(0, 5)
self.__interfaceKit.getInterfaceKit().setSensorChangeTrigger(1, 35)
self.__interfaceKit.getInterfaceKit().setSensorChangeTrigger(2, 60)
self.__interfaceKit.getInterfaceKit().setSensorChangeTrigger(3, 200)
def sensorInputs(self, e):
temperature = (self.__interfaceKit.getSensor(0)*0.2222 - 61.111)
sound = (16.801 * math.log((self.__interfaceKit.getSensor(1))+ 9.872))
light = (self.__interfaceKit.getSensor(2))
motion = (self.__interfaceKit.getSensor(3))
# check temperature has changed - if yes, save and update
if temperature != self.__temperature:
self.__timeStamp=time.time()
self.__strTimeStamp=datetime.datetime.fromtimestamp(self.__timeStamp).strftime('%Y-%m-%d %H:%M:%S')
self.__temperature = temperature
print("Temperature is: %i:" % self.__temperature)
self.writeToDatabase( 'temperature', self.__temperature, self.__strTimeStamp)
#check sound has changed - if yes, save and update
if sound != self.__sound:
self.__timeStamp=time.time()
self.__strTimeStamp=datetime.datetime.fromtimestamp(self.__timeStamp).strftime('%Y-%m-%d %H:%M:%S')
self.__sound = sound
print("Sound is: %i " % self.__sound)
self.writeToDatabase( 'sound', self.__sound, self.__strTimeStamp )
#check light has changed - if yes, save and update
if light != self.__light:
self.__timeStamp=time.time()
self.__strTimeStamp=datetime.datetime.fromtimestamp(self.__timeStamp).strftime('%Y-%m-%d %H:%M:%S')
self.__light = light
print("Light is: %i " % self.__light)
self.writeToDatabase( 'light', self.__light, self.__strTimeStamp )
if motion != self.__motion:
self.__motion = motion
print ("motion is %i" % self.__motion)
def openDatabase(self):
cursor = self.__connection.cursor()
cursor.execute("CREATE TABLE " + self.__dbName + " (sensor text, value text, time_stamp text)")
def writeToDatabase(self, sensorType, data, time):
cursor = self.__connection.cursor()
cursor.execute("INSERT INTO " + self.__dbName + " VALUES (?, ?, ?)", (sensorType, data, time))
self.__connection.commit()
def closeDatabase():
self.__connection.close()
def start(self):
try:
self.__interfaceKit.getInterfaceKit().setOnAttachHandler(self.interfaceKitAttached)
self.__interfaceKit.getInterfaceKit().setOnSensorChangeHandler(self.sensorInputs)
self.openDatabase()
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
这就是问题所在:::
^{pr2}$编辑,错误消息:
回溯(最近一次呼叫): 文件“H:\Project\Student\Prototype 1\事件原型.py“,第159行,英寸 规则=规则()
文件“H:\Project\Student\Prototype 1\事件原型.py“,第146行,ininit 自身温度 AttributeError:“Rules”对象没有属性“Rules\u temperature”
子类不能访问私有成员(以
__
开头)。(好吧,它们可以通过一些黑客手段访问,但不应该)。 (见here)在您的例子中,
__temperature
是基类sensors
的私有成员,但是您是从子类Rules
访问它的。在用一个下划线(
__temperature
->;_temperature
)替换双下划线前缀,这样就可以开始了。在双下划线成员被认为是私有的,您必须用定义该成员的类名为其添加前缀。在
像这样使用这些神奇的私人成员:
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