Getset_descriptor is not callable

I can not use the Revit API cause I want to run the project Refinery and in order to do a thin code in Dynamo and also use loops and so on I prefer to use Python but instead of using the Revit APPi just importing the dynamo geometry nodes in Python.
But i am having a problem, as a test (later the python code will be longer) i am just trying to use the Line.Direction() but it gives me a get.set_descriptor error and I just dont understand where is the probem. Could someone help me out?
As an imput in the for loop is a list coming from another python node that you can see in the screenshot Refinery_Python_03.
Thanks in advance =)

I found the solution here: