Connection between Python and Dynamo

Developers
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1

i’m mainly on C# and Revit, not expert on Python (yet) so pls forgive my naive questions, i encountered similar issues just recently that output from Python cannot be used in Dynamo input even though data type looks the same, see attached.
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not like C#, seems Python lacks debugging method, i usually put any stuff in OUT for checking purpose which is not efficient at all, any tips in debugging?
thanks.

2

You’re feeding the node a Revit bounding box, whereas it expects a dynamo one. Even tho the two are semantically the same, they are entirely different object types.

Similarly, Dynamo’s all elements of categories node expects a “wrapped” category type

3

thanks Dimitar, i did try “wrapped” stuff but didn’t work, perhaps my code is wrong?

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4

Hi @Ning_Zhou

Here is one of the example how you can wrap:

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5

thanks KulKul for the tip, yet to figure out boundingbox issue and what’s wrong w/ ToDSType?

6

hi KulKul, do you know how to convert BuiltInCategory from Python to Dynamo i.e. “bics = System.Enum.GetValues(BuiltInCategory)” which has more categories than “cats = doc.Settings.Categories”, and i don’t quite understand yet, thanks

7

hi Dimitar, is there any documentation on (un)wrap stuff i.e. how to use ToDSType and ToRevitType? seems i still cannot figure out how to convert Python’s BoundingBox to Dynamo one, thanks.

8

Hi @Ning_Zhou.

Have a look at this:

https://github.com/DynamoDS/Dynamo/wiki/Python-0.6.3-to-0.7.x-Migration

9

thanks Martin for the link.
well, seems ToDSType not working for bounding box?
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10

That’s because you’re calling Dynamo’s Revit Element wrapper method. If you are looking to return ProtoGeometry try ToProtoType() instead.

11

thanks Thomas, i tried ToProtoType(), same error message

12

You’re using wrong quotation marks :slight_smile: or at least the formatting is wrong on them :slight_smile:
Look at line 23 and maybe others before that

13

great eye, thanks Jonathan!

14

i have an old issue which i posted before: seems OOTB Element.BoundingBox doesn’t work for 3D section box via OOTB Select Model Element, so i tried via Python, seems nothing works

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