Phidgets Forums

Posted: **Sun Jul 25, 2021 12:28 pm**

Python 2.7

The api documentation says I can do

parent = ch.getParent()
print("Parent: " + str(parent))

However, that just provides

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<Phidget22.Phidget.Phidget instance at 0x1011b2ea8>

Attempting to iterate through the object shows a little bit more, but nothing really useful and there do not even appear to be objects for the Parent (like a device handle), etc.

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var:_onError, val:None
var:handle, val:c_void_p(140473406883328)
var:_ErrorFactory, val:<class 'ctypes.CFunctionType'>
var:_PropertyChange, val:None
var:_DetachFactory, val:<class 'ctypes.CFunctionType'>
var:_onDetach, val:None
var:_AttachFactory, val:<class 'ctypes.CFunctionType'>
var:_Attach, val:None
var:_PropertyChangeFactory, val:<class 'ctypes.CFunctionType'>
var:_onAttach, val:None
var:_Detach, val:None
var:_onPropertyChange, val:None

Is there any sample code for using the object reti=urned from getParent()?

Posted: **Mon Jul 26, 2021 8:52 am**

getParent returns a Phidget handle, so rather than trying to use the properties of the object itself, you should use API calls on it, like:

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parent.getDeviceSerialNumber()
parent.getDeviceName()
parent.getDeviceSKU()

I agree the code sample in the API is misleading, so I'll look into getting that changed.

Posted: **Mon Jul 26, 2021 8:53 am**

Thanks!

Posted: **Tue Aug 03, 2021 12:17 pm**

A follow-up question. In Python, do you have an example of walking up the device tree?

Thanks.

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getParent()

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Re: getParent()