Python error when using lambda for poll function and annotations from future #86332

New Issue

Jesse Yurkovich · 2021-03-06T09:49:05+01:00

Jesse Yurkovich commented

2021-03-06 09:49:05 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: Quadro 600/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 369.09

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-05 20:45, hash: becc36cce5
Worked: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-20 05:19, hash: 37e6a1995a

caused by 08dbc4f996

Short description of error
The UI element which should allow the user to select which Camera to use as the adaptive subdivision dicing camera no longer functions. This seems like a recent regression in the past 2 weeks.

Exact steps for others to reproduce the error

Start with default scene
Enable Cycles, Experimental
Go to the Subdivision properties under Cycles and attempt to select a Dicing Camera
Observe that nothing is listed even when adding new cameras to the scene, not even the default camera is listed

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: Quadro 600/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 369.09 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-03-05 20:45, hash: `becc36cce5` Worked: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-20 05:19, hash: `37e6a1995a` caused by 08dbc4f996 **Short description of error** The UI element which should allow the user to select which Camera to use as the adaptive subdivision dicing camera no longer functions. This seems like a recent regression in the past 2 weeks. **Exact steps for others to reproduce the error** - Start with default scene - Enable Cycles, Experimental - Go to the Subdivision properties under Cycles and attempt to select a Dicing Camera - Observe that nothing is listed even when adding new cameras to the scene, not even the default camera is listed

Jesse Yurkovich commented

2021-03-06 09:49:05 +01:00

Added subscriber: @deadpin

Philipp Oeser commented

2021-03-06 10:20:01 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-03-06 10:20:01 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Philipp Oeser self-assigned this 2021-03-06 10:20:01 +01:00

Philipp Oeser commented

2021-03-06 10:20:01 +01:00

Confirmed, will check

Philipp Oeser commented

2021-03-06 12:41:27 +01:00

It is caused by 08dbc4f996

I am getting this now:

Traceback (most recent call last):
  File "/build_linux/bin/2.93/scripts/modules/bpy_types.py", line 783, in draw_ls
    operator_context_default = self.layout.operator_context
AttributeError: 'CyclesRenderSettings' object has no attribute 'layout'

dicing_camera is using a lambda for its poll, thought that might be the reason, but so does e.g. the Sun Position Addon [and there it is working properly].

It is caused by 08dbc4f996 I am getting this now: ``` Traceback (most recent call last): File "/build_linux/bin/2.93/scripts/modules/bpy_types.py", line 783, in draw_ls operator_context_default = self.layout.operator_context AttributeError: 'CyclesRenderSettings' object has no attribute 'layout' ``` `dicing_camera` is using a lambda for its poll, thought that might be the reason, but so does e.g. the Sun Position Addon [and there it is working properly].

Philipp Oeser removed their assignment 2021-03-06 13:13:29 +01:00

Philipp Oeser commented

2021-03-06 13:13:29 +01:00

Added subscriber: @ideasman42

Philipp Oeser commented

2021-03-06 13:13:29 +01:00

but so does e.g. the Sun Position Addon [and there it is working properly].

that does not do the following though

from __future__ import annotations

it is probably more effective if @ideasman42 has a look here.

> but so does e.g. the Sun Position Addon [and there it is working properly]. that does not do the following though ``` from __future__ import annotations ``` it is probably more effective if @ideasman42 has a look here.

blender-admin commented

2021-03-12 16:33:13 +01:00

This issue was referenced by 476be3746e

This issue was referenced by 476be3746e85b4891189c8d480501905b9400c66

Brecht Van Lommel commented

2021-03-12 17:50:34 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Brecht Van Lommel closed this issue

2021-03-12 17:50:34 +01:00

Brecht Van Lommel self-assigned this 2021-03-12 17:50:34 +01:00

Brecht Van Lommel commented

2021-03-12 17:55:02 +01:00

Changed status from 'Resolved' to: 'Confirmed'

Brecht Van Lommel reopened this issue

2021-03-12 17:55:02 +01:00

Brecht Van Lommel commented

2021-03-12 17:55:02 +01:00

I committed a workaround, but I don't know if there is a deeper issue here in the Python API or Python itself. I'll leave it to the Python module to decide if they want to look into this further.

I guess that : from the lambda somehow messes with annotation parsing? Still not clear to me how that ends up affecting the GenericUI class.

      dicing_camera: PointerProperty(                                                                             
          name="Dicing Camera",
          type=bpy.types.Object,
          poll=lambda self, obj: obj.type == 'CAMERA',                                                            
      )

I committed a workaround, but I don't know if there is a deeper issue here in the Python API or Python itself. I'll leave it to the Python module to decide if they want to look into this further. I guess that `:` from the lambda somehow messes with annotation parsing? Still not clear to me how that ends up affecting the `GenericUI` class. ``` dicing_camera: PointerProperty( name="Dicing Camera", type=bpy.types.Object, poll=lambda self, obj: obj.type == 'CAMERA', ) ```

Brecht Van Lommel changed title from ~~Cycles dicing camera is not settable in the UI~~ to Python error when using lambda for poll function and annotations from future

2021-03-12 17:55:42 +01:00

Brecht Van Lommel removed their assignment 2021-03-12 17:55:42 +01:00

Brecht Van Lommel commented

2021-03-12 17:55:42 +01:00

Added subscriber: @brecht

Campbell Barton self-assigned this 2021-03-15 13:37:47 +01:00

blender-admin commented

2021-03-16 02:18:56 +01:00

This issue was referenced by e125305af4

This issue was referenced by e125305af41a7360c52b9a38024b7e24fde06d70

Campbell Barton commented

2021-03-16 05:20:00 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Campbell Barton closed this issue

2021-03-16 05:20:00 +01:00

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Python error when using lambda for poll function and annotations from future #86332