Create mechanical system type

i was trying to create mechanical system by python script. some reason i failed. Anybody can help me to correct my script

hi @shibujoseukken, try this

# dynamo version - 1.3.2
import clr
clr.AddReference('RevitAPI')
clr.AddReference('RevitServices')

from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Mechanical import *
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

doc = DocumentManager.Instance.CurrentDBDocument

TransactionManager.Instance.EnsureInTransaction(doc)

mech_sys_type = MechanicalSystemType.Create(doc, MEPSystemClassification.SupplyAir , 'dummy')

TransactionManager.Instance.TransactionTaskDone()

OUT = mech_sys_type