Question

我想获取一个返回值，该值会由于触发的事件而改变值。像这样：

class A:
      def __init__(self):
        self.ev_nearby = 0

      def changeValue(self):
         self.ev_nearby = 1
         return self.ev_nearby

      # I want this value in class B
      def getChangedValue(self):
         return self.ev_nearby

      def logic(self):
          while(somethingHappens) {
             self.changeValue()
          }
      # logic is called in another class

class B:
      A = A()
      # I want the value here like
      valueFromA = A.getChangedValue()

之所以如此，是因为我在服务器中动态需要两个值。但是直到现在，我在类B中的valueFromA仍然保持为0（已触发或未触发）。

Answer 1

似乎.logic()在对象的另一个实例上被调用，而不是您尝试从中检索值的实例。要从同一实例检索值，可以将其作为变量传递给另一个类的范围。有关更多信息，请查看Object Oriented Programming (in Python)

的基础知识

下面，我写了一个小例子来说明如何实现：

class A:
  def __init__(self):
    self.ev_nearby = 0

  def changeValue(self):
     self.ev_nearby = 1
     return self.ev_nearby

  # I want this value in class B
  def getChangedValue(self):
     return self.ev_nearby

  def logic(self):
      while(somethingHappens) {
         self.changeValue()
      }
  # logic is called in another class

class B:
  # I want the value here like
  def getValueFromA(self, A):
     valueFromA = A.getChangedValue()
     return valueFromA

class C:
  A = A()
  A.logic()
  B = B()
  B.getValueFromA(A)

从另一个类的函数获得回报

1 个答案: