PyRx provides Python bindings for CAD software:
C++ bindings:
- AutoCAD®: ObjectARX® 2021-2025
- ZwCAD®: ZRX® 2024-2025
- GstarCAD®: GRX® 2024-2025
- BricsCAD®: BRX® v24-v25
ActiveX bindings:
- AutoCAD®: 2021-2025
- BricsCAD®: v24-v25
- GstarCAD®: 2024-2025
- ZwCAD®: 2024-2025
Wherever in this project we talk about AutoCAD, we mean all supported applications (BricsCAD, GstarCAD, ZwCAD), and when we talk about ARX (Object ARX), we also mean BRX, GRX and ZRX.
Uses wxPython for the GUI, dialogs, and CAdUiPalette wrapper. Embeds Python (3.12) and wxPython (4.2.2) into a loadable ARX module.
Install python 3.12.X (64 bit) with the ❗PATH checkbox❗ set to true:
,
Install PyRx from PyPI:
pip install cad-pyrxUse APPLOAD command or the startup suite to load PyRx in CAD application, example:
_APPLOAD
%localappdata%\Programs\Python\Python312\Lib\site-packages\pyrx\RxLoaderZ25.0.zrx
Install PyRx from a tag , e.g. for git tag v2.1.7:
python -m pip install git+https://github.com/CEXT-Dan/[email protected]Install PyRx from the latest commit:
python -m pip install git+https://github.com/CEXT-Dan/PyRx.gitUninstall:
python -m pip uninstall cad-pyrxAutoCAD user may optionally install a .bundle using the MSI installer attached to the release
Get the latest build from GitHub Releases.
When loading the ARX/BRX/GRX/ZRX module, the following commands are added to CAD application:
- PYLOAD: Use this command to load your Python modules
- PYRELOAD: Use this command to reload your Python modules
- PYCMDPROMPT: Provides simple access to the python interpreter
- PYRXVER: Prints the ARX module version
- PYRXLOADLOG: Prints the ARX module load logs
Autolisp commands:
(adspyload PATH) returns T or nil
(adspyreload PATH) returns T or nil
(adspyloaded) returns a list of loaded modules
from pyrx import Rx, Ge, Gi, Db, Ap, Ed, Sm
import traceback
# these four (Optional) functions are called as they would be in ARX
def OnPyInitApp():
print("\nOnPyInitApp")
print("\ncommand = pydoit")
def OnPyUnloadApp():
print("\nOnPyUnloadApp")
def OnPyLoadDwg():
print("\nOnPyLoadDwg")
def OnPyUnloadDwg():
print("\nOnPyUnloadDwg")
# functions that are prefixed with PyRxCmd_ are registered as AutoCAD commands
def PyRxCmd_pydoit():
try:
db = Db.HostApplicationServices().workingDatabase()
# create a line
line = Db.Line()
line.setDatabaseDefaults()
# use Ge point
line.setStartPoint(Ge.Point3d(0, 0, 0))
line.setEndPoint(Ge.Point3d(100, 100, 0))
# set a color
color = Db.Color()
color.setRGB(255, 255, 0)
line.setColor(color)
# open modelspace for write and add the entity
model = Db.BlockTableRecord(db.modelSpaceId(), Db.OpenMode.ForWrite)
model.appendAcDbEntity(line)
except Exception:
traceback.print_exc()from pyrx import Rx, Ge, Gi, Db, Ap, Ed, Ax
import traceback
def PyRxCmd_makeTable():
try:
axApp = Ax.getApp()
axDoc = axApp.ActiveDocument
tablePnt = axDoc.Utility.GetPoint("\nTable location: ")
axDoc.ModelSpace.AddTable(tablePnt, 5, 5, 10, 30)
except Exception:
traceback.print_exc()
def PyRxCmd_hitTest():
try:
axApp = Ax.getApp()
axDoc = axApp.ActiveDocument
hitVec = (0, 0, 1) # kZaxis
hitPnt = axDoc.Utility.GetPoint("\nSelect cell: ")
minmax = hitPnt + axDoc.GetVariable("VSMAX")
axSs = axDoc.SelectionSets.Add("AXTBLSS")
axSs.SelectByPolygon(
Ax.constants.acSelectionSetFence, minmax, [0], ["ACAD_TABLE"]
)
for axEnt in axSs:
axTable = Ax.IAcadTable(axEnt)
hit = axTable.HitTest(hitPnt, hitVec)
if hit[0]:
cellstr = "Cell={},{}".format(hit[1], hit[2])
axTable.SetTextString(hit[1], hit[2], 0, cellstr)
return
except Exception:
traceback.print_exc()
finally:
axSs.Delete()and many more examples: https://github.com/CEXT-Dan/PyRx/tree/main/PySamples
-
Create GUIs with wxPython, bindings for dialogs and palettes
-
Generated stub files for built in help, autocomplete
-
Debugging support with debugpy
