In a Python box with the onStopped output set to "string"

signal connect

class MyClass(GeneratedClass):
    def __init__(self):
        GeneratedClass.__init__(self)

    def onLoad(self):
        #put initialization code here
        self.id = None

    def onUnload(self):
        #put clean-up code here
        if self.id:
            self.session().service("ALTabletService").onInputText.disconnect(self.id)

    def onInput_onStart(self):
        #self.onStopped() #activate the output of the box
        self.id = self.session().service("ALTabletService").onInputText.connect(self.callback)
    
    def callback(self, i, text):
        self.onStopped(text)

    def onInput_onStop(self):
        self.onUnload() #it is recommended to reuse the clean-up as the box is stopped
        self.onStopped() #activate the output of the box