import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import*
clr.AddReference('RevitServices')
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument

TransactionManager.Instance.EnsureInTransaction(doc)

#Outputs
faces = []
geometry = []
painter = []

opt = Options()
painted = []
not_painted = []

#inputs
walls = UnwrapElement(IN[0])
mat = UnwrapElement(IN[1])

#Wall Faces
for wall in walls:
	geo = wall.Geometry[opt]
	geometry.append(geo)
	for g in geo:
		face = g.Faces
		faces.extend(face)

	for f in faces:
		try:
			painter = doc.Paint(wall.Id,f,mat.Id)
			painted.append(f)
		except:
			not_painted.append(f)

TransactionManager.Instance.TransactionTaskDone()

OUT = painted, not_painted