Support default value in getattr

[iatkinson]

It would be great to be able to write:

patient_name = message.ORM_O01_PATIENT.PID.PATIENT_NAME
suffix = getattr(patient_name, 'PROFESSIONAL_SUFFIX', '')

rather than having to use hasattr or handle an exception if the attribute is not present.

[iatkinson]

The root cause seems to be that Element uses return self.children.get(name) in __getattr__ and this throws ChildNotValid exception, which is not an AttributeError.

[svituz]

Hi Ian,
you're right. We'll try to put that feature in the next release.
Thank you,
Vittorio