AttributeError: 'WindowManager' 对象没有属性 'createWindow'

如何解决AttributeError: 'WindowManager' 对象没有属性 'createWindow'

这是两个代码块：

class WindowManager(object):
  def __init__(self,windowName,keypressCallback = None):
    self.keypressCallback = keypressCallback
    self._windowName = windowName
    self._isWindowCreated = False

    @property
    def isWindowCreated(self):
      return self._isWindowCreated
    def createWindow(self):
      cv2.namedWindow(self._windowName)
      self._isWindowCreated = True
    def show(self,frame):
      cv2.imsmhow(self._windowName,frame)
    def destroyWindow(self):
      cv2.destroyWindow(self._windowName)
      self._isWindowCreated = False
    def processEvents(self):
      keycode = cv2.waitKey(1)
      if self.keypressCallback is not None and keycode != -1:
        self.keypressCallback(keycode)

class Cameo(object):
  def __init__(self):
    self._windowManager = WindowManager('Cameo',self.onKeypress)
    self._captureManager = CaptureManager(cv2.VideoCapture(0),self._windowManager,True)

  #Defining the run method:
  def run(self):
    self._windowManager.createWindow()
    while self._windowManager.isWindowCreated:
      self._captureManager.enterFrame()
      frame = self._captureManager.frame
      if frame is not None:
        self._captureManager.exitFrame()
        self._windowManager.processEvents()

  #Define the onKeypress method:
  def onKeypress(self,keycode):
    if keycode == 32:
      self._captureManager.writeImage('screenshot.png')
    elif keycode == 9:
      if not self._captureManager.isWritingVideo:
        self._captureManager.startWritingVideo('screencast.avi')
      else:
        self._captureManager.stopWritingVideo()
    elif keycode == 27:
      self._windowManager.destroyWindow()

#Adding a main block that instatiates and runs cameo
if __name__=="__main__":
  Cameo().run()

我正在尝试运行我的代码，但即使我调用的属性被定义为类属性的一部分，我仍然收到属性错误。非常感谢您的回答。

解决方法

这是一个简单的缩进错误。

您的所有 WindowManager 属性都在您的 __init__() 函数中定义

（因此它们对您的程序的其余部分不可见）