Get elements connected to Duct Accessories

Revit
,
1

Hey

I’m working on a script to automate parameter updates for elements connected to Duct Accessories. Specifically, I want to identify any Ducts or Duct Fittings physically connected to an accessory and push a value to a specific parameter on those neighbors.

I am using the MEPover package, but I’m hitting a wall at the connector stage.Element.Connectors consistently returns null or empty lists, even when the accessories are properly snapped into the duct line in Revit.

Here is what i have so far:

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image1920×664 214 KB

Thanks in advance

2

Do you have IronPython 2.7 installed? As far as I know, MEPover has not updated recently enough to be using the newer engine.

3

The python in the MEPover custom nodes is getting a little on the crusty side
Here is some refactored updates that should work with any flavour of python

Connected Connector

import clr

clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager

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


# Many thanks to Konrad K Sobon for his awesome ProcessList function!
def ProcessList(_func, _list):
    return list(
        map(lambda x: ProcessList(_func, x) if type(x) == list else _func(x), _list)
    )


def getAllRefs(connector):
    refs = []
    try:
        if connector.IsConnected:
            refs = [
                x
                for x in connector.AllRefs
                if x.Owner.Id != connector.Owner.Id
                and x.ConnectorType != ConnectorType.Logical
            ]
    except Exception:
        pass

    if not refs:
        return None
    return refs if len(refs) > 1 else refs[0]


if isinstance(IN[0], list):
    connectors = ProcessList(UnwrapElement, IN[0])
else:
    connectors = [UnwrapElement(IN[0])]

# Assign your output to the OUT variable.
OUT = ProcessList(getAllRefs, connectors)

Connector Host

import clr

clr.AddReference("RevitServices")
from RevitServices.Persistence import DocumentManager

doc = DocumentManager.Instance.CurrentDBDocument


# Many thanks to Konrad K Sobon for his awesome ProcessList function!
def ProcessList(_func, _list):
    return list(
        map(lambda x: ProcessList(_func, x) if isinstance(x, list) else _func(x), _list)
    )


def getConnHost(connector):
    host = None
    try:
        host = doc.GetElement(connector.Owner.Id)
        return host
    except Exception:
        pass


if isinstance(IN[0], list):
    connectors = ProcessList(UnwrapElement, IN[0])
else:
    connectors = [UnwrapElement(IN[0])]

# Assign your output to the OUT variable.
OUT = ProcessList(getConnHost, connectors)
4

Hey Robert

I have installed IronPython 2.7 what nodes can i use from that package?

5

It’s not that you need nodes from the package - it’s that the MEPover package requires IronPython 2.7 to actually run, unless you factor the code like @Mike.Buttery has recommended.