TypeError: expected Curve, got Curve - Dynamo + Python

Revit
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#1

Hi Everybody.
I´m trying to create a wall with python node.
I’m using " Wall.Create(doc,curve,level.Id,bool)

I’m not sure about this error.

Python Script got crash:

Warning: IronPythonEvaluator.EvaluateIronPythonScript operation failed.
Traceback (most recent call last):
File “”, line 41, in
TypeError: expected Curve, got Curve

Error dynamo
Error dynamo1434×880 102 KB

This is my Script:

import clr
#Revit API permite usar elementos de Revit (geometría, líneas, etc)
clr.AddReference(‘RevitAPI’)
from Autodesk.Revit.DB import *
from Autodesk.Revit.DB.Structure import *
#Get Revit Elements
clr.AddReference(‘RevitNodes’)
import Revit
clr.ImportExtensions(Revit.GeometryConversion)
clr.ImportExtensions(Revit.Elements)

#Access Revit Document
clr.AddReference(‘RevitServices’)
import RevitServices
from RevitServices.Persistence import DocumentManager
#Transaction permite ejecutar acciones en Revit
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument

#Preparing input from dynamo to revit
Curve = (IN[0])
level = UnwrapElement(IN[1])
bool = IN[2]

refLines=

if isinstance(Curve, list):
refLines.extend(IN[0])
else:
refLines.append(IN[0])

#Do some action in a Transaction
TransactionManager.Instance.EnsureInTransaction(doc)

wall =
for i in refLines:

  wall.append(Wall.Create(doc,refLines[-1+1],level.Id,bool))

TransactionManager.Instance.TransactionTaskDone()

OUT = wall

1 Like
#2

This is a namespace conflict. Both DesignScript (Dynamo) and the Revit API have a Curve class. Judging by what it shown in this blog post, you should be able to take your curve from Dynamo and convert it to a proper Revit object like this:

curves = IN[0]
level = UnwrapElement(IN[1])
is_structural = IN[2]

walls = []
for curve_ds in curves:
    curve_rvt = gc.ProtoToRevitCurve.ToRevitType(curve_ds)
    walls.append(Wall.Create(doc, curve_rvt, level.Id, is_structural))

Edit: See @Kulkul’s post for proper syntax.

The error is telling you that you are providing a Dynamo Curve, but it expects an Autodesk.Revit.DB.Curve. It is also good practice to avoid naming variables the same as Python built-in functions or other objects. For example:

bool (Python object)
Curve (Revit and DS class)

2 Likes
#3

Thank you!!
But, when I use your script,I get a new error :S
Help me pls!!!
AttributeError: ‘Curve’ object has no attribute 'ProtoToRevitCurve’

Screenshot_1
Screenshot_11505×862 129 KB

#4

Hi @niojuri22

You need to convert to RevitType() as @cgartland pointed and make sure you import clr.ImportExtensions(Revit.GeometryConversion) in order to use RevitType():

image
image1853×765 148 KB 

import clr
clr.AddReference('RevitNodes')

import Revit
clr.ImportExtensions(Revit.Elements)
clr.AddReference('RevitServices')
clr.ImportExtensions(Revit.GeometryConversion)
from Revit import GeometryConversion as gc

import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

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

doc = DocumentManager.Instance.CurrentDBDocument

curves = IN[0]
level = UnwrapElement(IN[1])
is_structural = IN[2]
TransactionManager.Instance.EnsureInTransaction(doc)
walls = []
for curve_ds in curves:
    curve_rvt = gc.ProtoToRevitCurve.ToRevitType(curve_ds)
    walls.append(Wall.Create(doc, curve_rvt, level.Id, is_structural))
TransactionManager.Instance.TransactionTaskDone()

OUT = walls
3 Likes
#5

Thank You Very Much!!!
It works!