android - Python class to inherit MonkeyDevice -

i followed solution given here , added method extend functionality device class. how inherit monkeydevice?

i error object has no attribute 'test'. looks class instance of type monkeydevice. doing wrong?

from com.android.monkeyrunner import monkeyrunner, monkeydevice, monkeyimage  class device(monkeydevice):      def __new__(self):         return monkeyrunner.waitforconnection(10)      def __init__(self):         monkeydevice.__init__(self)     def test():         print "this test"  device = device() device.test(self) 

you doing lot of things wrong. unfortunately don't use monkeyrunner can't details related library itself.

what code following:

>>> class monkeyrunner(object): pass ...  >>> class device(monkeyrunner): ...     def __new__(self): ...             return monkeyrunner() ...     def __init__(self): ...             super(device, self).__init__() ...     def test(): ...             print "this test" ...  >>> device = device() >>> device.test(self) traceback (most recent call last):   file "<stdin>", line 1, in <module> attributeerror: 'monkeyrunner' object has no attribute 'test' >>> device <__main__.monkeyrunner object @ 0xb743fb0c> >>> isinstance(device, device) false 

note how device not device instance. reason __new__ method not returning device instance, monkeyrunner instance. answer linked in question states:

anyway achieve want should create class custom __new__ rather __init__, monkeydevice instance factory and inject stuff instance or it's class/bases/etc.

which means should have done like:

>>> class device(monkeyrunner): ...     def __new__(self): ...             inst = monkeyrunner() ...             inst.test = device.test ...             return inst ...     @staticmethod ...     def test(): ...             print "i'm test" ...  >>> device = device() >>> device.test() i'm test 

however isn't useful @ all, since device function:

>>> def device(): ...     def test(): ...             print "i'm test" ...     inst = monkeyrunner() ...     inst.test = test ...     return inst ...  >>> device = device() >>> device.test() i'm test 

afaik cannot subclass monkeyrunner , create instance waitforconnection method, @ least if waitforconnection staticmethod.

what i'd use delegation:

class device(object):     def __init__(self):         self._device = monkeyrunner.waitforconnection(10)     def __getattr__(self, attr):         return getattr(self._device, attr)     def test(self):         print "i'm test"