Python: Collect attribute from a list of objects where attribute exists

Collect attribute from class object in list | .py

existing_names = [getattr(x, "name", "") for x in nodes if type(x).__name__ == node_class]

Collect attribute from list of objects | .py

values = [ getattr(x.data, "age", "") for x in nodes ]
>> ['5', '7', '12']

# However if the attribute 'age' is not there it returns this
>> ['5', '', '7', '', '12']
values = [ getattr(x.data, 'age', '') for x in nodes ]
values = filter(bool, values)
>> ['5', '7', '12']

# or use these options
values = [ getattr(x.data, 'age') for x in nodes if hasattr(x.data, 'age')]
values = [ x.data.age for x in nodes if hasattr(x.data, 'age')]

values = [ x.data.age for x in nodes if hasattr(x, 'data') and hasattr(x.data, 'age') ]