Description
Getting all rooms in Revit means using the Revit FilteredElementCollector and filtering by the class. The only thing that needs to be remembered is that a Room doesn't directly inherit Element but instead you can use SpatialElement.
In this article the C# approach is translated into Dynamo using Python.
Solution
python
import clr
clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager
doc = DocumentManager.Instance.CurrentDBDocument
clr.AddReference("RevitAPI");
from Autodesk.Revit.DB import FilteredElementCollector
from Autodesk.Revit.DB import SpatialElement
from Autodesk.Revit.DB.Architecture import Room
collector = FilteredElementCollector(doc)
collection = collector.OfClass(SpatialElement).ToElements()
rooms = []
for element in collection:
if (element.GetType().Equals(Room)):
rooms.append(element)
OUT = rooms