door handing

#Copyright(c) 2014, Konrad Sobon
# @arch_laboratory, http://archi-lab.net

import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

# Import ToDSType(bool) extension method
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)

# Import DocumentManager and TransactionManager
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

from System.Collections.Generic import *

# Import RevitAPI
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *

doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application

#The inputs to this node will be stored as a list in the IN variable.
dataEnteringNode = IN

#unwrap inputs
elements = []
for i in IN[0]:
    elements.append(UnwrapElement(i))

#get phase
collector = FilteredElementCollector(doc)
phase_collector = collector.OfClass(Phase)

for i in phase_collector:
    if i.Name == "New Construction":
        phase = i
    else:
        print("no phase w/ specified name exists")

#check if door has a left or right handed swing
right, left, lhr, rhr = [], [], [], []
for i in elements:
    to_room = i.ToRoom[phase]
    if to_room is not None:
        if not i.FacingFlipped:
            if i.HandFlipped:
                right.append(i)
            else:
                left.append(i)
        else:
            if i.HandFlipped:
                left.append(i)
            else:
                right.append(i)
    else:
        if i.FacingFlipped:
            if i.HandFlipped:
                rhr.append(i)
            else:
                lhr.append(i)
        else:
            if i.HandFlipped:
                lhr.append(i)
            else:
                rhr.append(i)
#Assign your output to the OUT variable
OUT = right, left, rhr, lhr