How to know if an object has an attribute in Python?

Question

Is there a way in Python to determine if an object has some attribute? For example: >>> a = SomeClass() >>> a.someProperty = value >>> a.property Traceback (most recent call last): File "", line 1, in AttributeError: SomeClass instance has no attribute 'property'How can you tell if a has the attribute property before using it?

Answer 1

The dir() function

my_object = TheObject()

print(dir(my_object))

The dir function returns a list of all the available attributes in an object.

The only other ways would be to read the documentation on the class/object in question or to read the code that implements it.

Hope that helps :)