Adding a STEP-imported part fails with pickle error
NelisW opened this issue · comments
Windows 11
Python 3.12.3 in a conda environment set up for build123d
python 3.12.3 h1d929f7_1
Using the latest build123d github version as of about four weeks ago.
build123d 0.5.1.dev62+g4561105 pypi_0 pypi
import build123d as b3d
import ocp_vscode as ov
import numpy as np
ov.set_port(3939)
ov.set_defaults(reset_camera=ov.Camera.KEEP, ortho=True, black_edges=True,measure_tools=True)
snaps = b3d.import_step("Multiboard Tight Snap.step")
with b3d.BuildPart() as snap:
b3d.add(snaps)
for the STEP file downloaded from here:
https://thangs.com/designer/Keep%20Making/3d-model/Multiboard%20Tight%20Snap-974403
(Much!) earlier version of build123d worked for STEP files downloaded from the multiboard thangs pages.
As another test, I created a simple cube in FreeCAD and exported a STEP file using checked Export invisible objects, and AP214 standard, and got the same error. So on at least two differently-sourced files the error remains.
Unnamed-PartCube.zip
Both resulted in this error message
$ python HAGreen.py
Traceback (most recent call last):
File "K:\WorkP\3dprint\3dprint\projects\kameelperd\homeassistantgreen\HAGreen.py", line 32, in <module>
b3d.add(snaps)
File "C:\Users\nwillers\AppData\Local\anaconda3\envs\b123d\Lib\site-packages\build123d\operations_generic.py", line 123, in add
object_iter = [obj.moved(rotation) for obj in object_iter]
^^^^^^^^^^^^^^^^^^^
File "C:\Users\nwillers\AppData\Local\anaconda3\envs\b123d\Lib\site-packages\build123d\topology.py", line 2448, in moved
shape_copy: Shape = copy.deepcopy(self, None)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\nwillers\AppData\Local\anaconda3\envs\b123d\Lib\copy.py", line 143, in deepcopy
y = copier(memo)
^^^^^^^^^^^^
File "C:\Users\nwillers\AppData\Local\anaconda3\envs\b123d\Lib\site-packages\build123d\topology.py", line 2315, in __deepcopy__
setattr(result, key, copy.deepcopy(value, memo))
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\nwillers\AppData\Local\anaconda3\envs\b123d\Lib\copy.py", line 151, in deepcopy
rv = reductor(4)
^^^^^^^^^^^
TypeError: cannot pickle 'OCP.TDF.TDF_Label' object
I know too little to add any insight to this.
thanks for working so hard on b123d!
This is a strange problem - thanks for pointing it out. Not as a fix but a potential work around, try extracting a solid like this:
p = import_step("Issue662-PartCube.step")
print(p.label)
print(p.color)
with BuildPart() as snap:
add(p.solid())(The step file is the Unnamed-PartCube.step renamed)
Cube
Color: (0.009721217676997185, 0.009721217676997185, 0.009721217676997185, 1.0) ~ GRAY10
Ah, just wanted to report the same issue.
Test case:
class ImportSTEP(unittest.TestCase):
[...]
def test_move_single_object(self):
export_step(Solid.make_box(1, 1, 1), "test.step")
box = import_step("test.step")
box_moved = Pos(X=1) * box
self.assertEqual(tuple(box_moved.location.position), (1, 0, 0))
I tried to avoid assigning the for_construction attribute in import_step, but my attempts weren't fruitful.
thanks for working so hard on b123d!
+1!
Fixed by @mbugert - thanks to all involved!