GUI in Python, how?

[AmolShah]

Not sure about tkinter
But if you are trying to put up a button for Yes/No, then this might help:

Python Yes/No Dialog Box?

Luckily, I made that Rhythm node. And it is long retired, so your version is WAAAAY old BTW. That being said, it sounds like you want to return true or false depending on the Yes/No selection. Here is how to do that. The python code in action: [20200207-pythonUI] and the actual code for copy pasta: import clr clr.AddReference("RevitAPIUI") from Autodesk.Revit.UI import * dialogContent = "You are about to delete all Fabrication Pipework content from the model. Are you sure?" but…