在Python中檢索現有的實例

Question

我想調用另一個類中的現有實例到Python中的其他類中，但我不知道該怎麼做，請幫忙！

class ButtonSelectRetire(object): 

    def __init__(self): 
     self.enabled = True 
     self.checked = False 
    def onClick(self):   

     cbr = ButtontRetire() 
     cbr.off()  

class ButtontRetire(object): 

    def __init__(self): 
     self.enabled = True 
     self.checked = False 

    def onClick(self): 
     pass 

    def on (self): 
     self.enabled = True 

    def off (self): 
     self.enabled = False 

Answer 1

也許你可以傳遞的ButtonRetire一個實例的ButtonSelectRetire構造：

class ButtonSelectRetire(object): 

    def __init__(self, button_retire): 
    self.enabled = True 
    self.checked = False 
    self.button_retire = button_retire 

    def onClick(self):   
    self.button_retire.off() 


>>> buttonRetire = ButtonRetire() 
>>> buttonSelectRetire = ButtonSelectRetire(buttonRetire) 

其實，據我瞭解，你要連接的信號buttonSelectRetire.onClick回調buttonRetire.off()？

如果你是在一個PyQt4的程序，這可以很容易做到：

self.buttonSelectRetire.onClick.connect(self.buttonRetire.off)