Dynamo Nodes count

1

Is there a way to get the count of nodes used on the canvas?

DynamoNodeCount
DynamoNodeCount.jpg1398Ă—734 293 KB

2

Yes. You can open the *.dyn file in a text editor and use “find” to count the number of “guid=” strings. I suggest notepad++

3

But could one do that with dynamo?

I think so - File.Read and some string nodes. You would have to manually path the location of the .DYN though.

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4

Is this still the only way to count nodes in a given graph or is there a button somewhere in the newer versions?

5

It’s definitely possible but I’m not sure if Python can do it. Dynamo API should give access to this, I believe the Monocle package uses a lot of this to look at nodes and what’s going on generally in Dynamo itself.

There’s a full list of references on fuget, but couldn’t get a list of node names to work in Python. Might be worth reaching out to John (author of Monocle) for leads here:

6

Python

If you are in Dynamo for Revit, you can do it right in Python by referencing the DynamoRevitModel:
(Note: other Dynamo supported tools have access to this too, but I don’t work in those as often, so yeah)

Screenshot:

Revit_9P9qVDXoTb
Revit_9P9qVDXoTb2340Ă—1039 501 KB

Python Script (CPython3)

# $ignore$ - this enables the node to ignore itself in the counts.

# Importing Reference Modules
# CLR ( Common Language Runtime Module )
import clr
# Adding the DynamoRevitDS.dll module to work with the Dynamo API
clr.AddReference('DynamoRevitDS')
import Dynamo 
from collections import defaultdict

# access to the current Dynamo instance and workspace
dynamoRevit = Dynamo.Applications.DynamoRevit()
currentWorkspace = dynamoRevit.RevitDynamoModel.CurrentWorkspace

usedNodes = []
thisNode = []

for i in currentWorkspace.Nodes:
    # if the node has ignore in the name, don't add to counts
    if "ignore" not in i.Name:
        if "Python" in i.GetType().ToString():
            # if a python script has ignore in the heading, don't add to counts
            if "$ignore$" in i.Script:
                #don't add to the list because that is this node
                thisNode = i
            else:
                usedNodes.append(i)
        else:
            usedNodes.append(i)
        
# grouped by node type
groups = defaultdict(list)

for node in usedNodes:
    groups[node.GetType()].append(node)

groupedByType = groups.values()

# get the data
OUT = len(usedNodes), usedNodes, groupedByType

Dynamo Graph

dynamoAPIWithPython.dyn (13.4 KB)

Graph Node Manager (Dynamo 2.15+)

The latest version(s) of Dynamo Core (2.15) have the Graph node manager, which allows export to excel, where you can do more finite node counts.

Screenshot

image
image942Ă—1182 71.5 KB

Monocle

I will definitely consider adding this as a tool. I added this as a feature request here.

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