ProtoGeometry and RevitAPI Library Conflict

Developers
1

An error appears when using the script. Could you explain it to me?
“Warning: IronPythonEvaluator.EvaluateIronPythonScript operation failed.
Traceback (most recent call last):
File “”, line 11, in
AttributeError: ‘type’ object has no attribute ‘ByPerimeterPoints’”
If you remove the RevitAPI Library, the script is executed.

I looked at the solution with a bypass of such problems, but I want to understand.

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


clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

lk11=IN[0]# 

xtx2=Surface.ByPerimeterPoints(lk11)

OUT =   xtx2
2

Both libraries (ProtoGeometry and RevitAPI) have a class named “Surface”. Your code contains two import statements and all names from first import are overridden by the second import.

It is considered a bad practice to use wildcard in ("*") in imports, because it leads to problems like the one in this thread. A solution is to write explicitly what you want to import:

from Autodesk.DesignScript.Geometry import Surface

And if there is a name conflict you can solve it like that

from Autodesk.DesignScript.Geometry import Surface as PGSurface
from Autodesk.Revit.DB import Surface as DBSurface

*Edit: @Andrey_Baranov You have answered yourself in the title of the thread.

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3

Thank you so much! This is a solution.
And how to determine the matching class names?
I’m afraid this is not the last such task.

4

Learning about imports in Python, Reading PEP8, basic knowledge of RevitAPI namespace and some searching will surely get you going.

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