[Question] Is AcDbBlockPropertiesTable (Dynamic Block Table) wrapped in PyDb?

[royccg]

Hi,

I am writing a plugin to manipulate Dynamic Blocks. I need to read the content (rows/columns) of the Block Properties Table.

https://help.autodesk.com/view/ACD/2025/ENU/?guid=GUID-4AACA828-07D0-4722-8BB0-7D77CB5FC338

I have iterated through the BlockTableRecord and found the entity. However, I cannot find a corresponding wrapper class in PyDb to cast this entity and access its data.

My Code:

# Iterating through BlockTableRecord entities
for ent_id in blk_def.objectIds():
    ent = Db.Entity(ent_id, Db.OpenMode.kForRead)
    
    # I found the entity, and its C++ class name is 'AcDbBlockPropertiesTable'
    if ent.isA().name() == "AcDbBlockPropertiesTable":
        print(f"Found Table Entity! Handle: {ent.handle().value()}")
        
        # Issue: I cannot cast it to read the table content.
        # e.g., table = Db.BlockPropertiesTable.cast(ent)  <-- This class does not exist in PyDb

Questions:

• Is AcDbBlockPropertiesTable currently wrapped in PyRx?

• If not, is there any workaround to read the table data (perhaps via PyAx or XData)?

• Do you have plans to support this in the future?

Thanks for your great work!

[CEXT-Dan]

AcDbBlockPropertiesTable is not a class in ObjectARX API.
Are you trying to collect dynamic block properties?

[CEXT-Dan]

there's a sample here getting dynamic block properties
https://github.com/CEXT-Dan/PyRx/blob/main/PySamples/PyDb/dynamicBlock.py
see pydynprops

[royccg]

Thanks, but i want to get properties table in block.

[CEXT-Dan]

Yeah, unfortunately I’m not too familiar with that. It looks to be more of a built-in command sequence than API calls.
dynamic block properties are available via API though. You can create your table with block properties though, something like

import traceback
from pyrx import Ap, Db, Ed, Ge
from collections import defaultdict

#uses M:\Dev\Projects\PyRxGit\tests\media\DynBlock.dwg


@Ap.Command()
def doit():
    try:
        db = Db.curDb()
        model = db.modelSpace(Db.OpenMode.kForWrite)
        data = defaultdict(list)

        allrefs = [Db.BlockReference(id) for id in model.objectIds(Db.BlockReference.desc())]
        for ref in allrefs:
            if ref.getBlockName() != "Limit_Switch":
                continue
            dynref = Db.DynBlockReference(ref.objectId())
            data["id"].append(dynref.anonymousBlockTableRecord())
            for prop in dynref.getBlockProperties():
                data[prop.propertyName()].append(str(prop.value()))

        tb = Db.Table()
        tb.setDatabaseDefaults()
        tb.setTableStyle(db.tablestyle())
        tb.setSize(len(next(iter(data.values()))) + 2, len(data))

        for c, (k, v) in enumerate(data.items()):
            for r, i in enumerate(v):
                r += 2
                if k == "id":
                    tb.setBlockTableRecordId(r, c, i, True)
                else:
                    tb.setTextString(r, c, i)

        model.appendAcDbEntity(tb)

    except Exception as err:
        traceback.print_exc()