Arning: IronPythonEvaluator.EvaluateIronPythonScript operation failed. Traceback (most recent call last): File "<string>", line 61, in <module> NameError: name 'from_room' is not defined

DesignScript
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1

Want to start off by saying this is not my script. This is supposed to be part of a Dynamo script that numbers the doors according to the room number. The tutorial on Youtube didnt provide the Python script so I tried to recreate it so I could follow along with the tutorial as well as get better at Python script. Getting this error.

Warning: IronPythonEvaluator.EvaluateIronPythonScript operation failed.
Traceback (most recent call last):
File “”, line 61, in
NameError: name ‘from_room’ is not defined

Put this through a Python syntax checker and it says there are no errors yet I still get the error within Dynamo. Can someone help me please.

2

Would you be able to provide the code you have written? The error implies that you are using a variable which you have not previously defined. For example:

a = 1
b = 2
c = a + d

This would raise the following error:

NameError: name 'd' is not defined

The syntax may be valid but the code will not execute.

4

Not sure if that pasted as intended

5

RevitDoorNumber.py (2.0 KB)

I attached the file becasue there was some formatting issues before when I tried to paste. Thanks for helping!

6

See if this code gives you the intended result:

import clr
clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager

doc = DocumentManager.Instance.CurrentDBDocument
elements = UnwrapElement(IN[0])
room_number, room_name, doors, room = [], [], [], []
for e in  elements:
	phase_id = e.CreatedPhaseId
	phase = doc.GetElement(phase_id)
	to_room = e.ToRoom[phase]
	from_room = e.FromRoom[phase]
	if from_room is None and to_room is None:
		room_number.append("No to or from room")
		room_name.append("No to or from room")
		doors.append("No to or from room")
	elif to_room is not None:
		num = to_room.LookupParameter("Number")
		name = to_room.LookupParameter("Name")
		if num:
			room_number.append(num.AsString())
		else:
			room_number.append("")
		if name:
			room_name.append(name.AsString())
		else:
			room_name.append("")
		doors.append(e)
		room.append(to_room)

OUT = room_number, room_name, doors, room

In your original script, the variable from_room was being defined within an if statement. Whenever the if statement evaluated to false, the from_room would not be defined, therefore resulting in your NameError.

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