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

# import revit API
clr.AddReference("RevitAPI")
import Autodesk
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Plumbing import *
#import document manager and transacetion 
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
#import ToDSType bool extension method
clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)


doc = DocumentManager.Instance.CurrentDBDocument

stpt = UnwrapElement(IN[0])			#get the pipe startpoint
level = UnwrapElement(IN[1])[0]		#get the base level
pipeType = UnwrapElement(IN[2])		#get the pipe type
systemType = UnwrapElement(IN[3])	#get the sytem type
endpt = UnwrapElement(IN[4]) 		#get the pipe endpoint
	
elements = [] 	#define emptylist
pipe = []		#define emptylist

#create transaction
TransactionManager.Instance.EnsureInTransaction(doc)

for i in range(0, len(IN[0])) : 
	pipe = Pipe.Create(doc, systemType.Id, pipeType.Id, level.Id,  XYZ(stpt[i].X, stpt[i].Y, stpt[i].Z ), XYZ(endpt[i].X, endpt[i].Y, endpt[i].Z ) ) #make pipe
	elements.append(pipe)

TransactionManager.Instance.TransactionTaskDone()
#Assign your output to the OUT variable.
OUT = elements