Determine if given class attribute is a property or not, Python object

You need to look at the class (this is the case for descriptors in general), which for objects you can find via the __class__ attribute or by using the type function:

>>> obj.__class__.my_property
<property object at 0xb74bd16c>

or by

>>> type(obj).my_property
<property object at 0xb720b93c>

These result in the same “property object” as if you were to directly check the attribute of the class (implying you know the class’ name in your code instead of checking it dynamically like you probably should rather do):

>>> A.my_property
<property object at 0xb7312345>

So to test if a specific attribute of an object is a property, this would be one solution:

>>> isinstance(type(obj).my_property, property)
True