# Creat New radial/diameter dimension by Revit API - Python

**URL:** <https://forum.dynamobim.com/t/creat-new-radial-diameter-dimension-by-revit-api-python/66482>\
**Category:** Developers\
**Tags:** revit, python, dynamo, api\
**Created:** [July 25, 2021, 1:46am UTC](https://forum.dynamobim.com/t/creat-new-radial-diameter-dimension-by-revit-api-python/66482 "2021-07-25T01:46:02Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![quantranarc](https://avatars.discourse-cdn.com/v4/letter/q/aeb1de/32.png) [@quantranarc](https://forum.dynamobim.com/u/quantranarc)\
**Post date:** [July 25, 2021, 1:46am UTC](https://forum.dynamobim.com/t/creat-new-radial-diameter-dimension-by-revit-api-python/66482/1 "2021-07-25T01:46:02Z")

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Hi everyone,

I’m currently working with the python code for create the new radial/diameter dimension for arc base on the revit API but I did not understand the reason that cannot find the NewRadialDimension or NewDiameterDimension when I was adding “from Autodesk.Revit.Creation import \*” as well.

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/9/5/952baf6220a41dc2a2210ffd1561053d18f36ab3.png)

## Also my code is

```auto
import clr

clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager
doc = DocumentManager.Instance.CurrentDBDocument
app = DocumentManager.Instance.CurrentUIApplication.Application

clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)

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

view = UnwrapElement(IN[0])
arc = UnwrapElement(IN[1])
point = UnwrapElement(IN[2])

TransactionManager.Instance.EnsureInTransaction(doc)

dim = doc.Create.NewRadialDimension(view, arc, point)
	
TransactionManager.Instance.TransactionTaskDone()

OUT = dim

```

* * *

Do you know any reason and please help me on this stuff that will be much appreciated. Many thanks

---

<div class="post-metadata">

**Author:** ![c.poupin](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/c.poupin/32/89152_2.png) [@c.poupin](https://forum.dynamobim.com/u/c.poupin)\
**Post date:** [July 27, 2021, 10:09am UTC](https://forum.dynamobim.com/t/creat-new-radial-diameter-dimension-by-revit-api-python/66482/2 "2021-07-27T10:09:19Z")

</div>

Hello @quantranarc

you can’t use `doc.Create.NewRadialDimension()` inside a project document (only in a family document)

 ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/1/3/13c47f68205423dda29d9524fe49b041c9eb5842.png)

instead, try to use this method

[https://www.revitapidocs.com/2020/2e3b9201-d5fa-3cdb-53e4-8e204bda1fe5.htm](https://www.revitapidocs.com/2020/2e3b9201-d5fa-3cdb-53e4-8e204bda1fe5.htm)