snap_cursor_to_selected Fails in Python #89862

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Leul Mulugeta · 2021-07-14T22:46:42+02:00

Leul Mulugeta commented

2021-07-14 22:46:42 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.92

Blender Version
Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: 1b8d33b18c
Worked: it Failed in 2.83 too

Short description of error
The snap_cursor_to_selected works with the shortcut but Fails in Python with an Error Message:

RuntimeError: Operator bpy.ops.view3d.snap_cursor_to_selected.poll() failed, context is incorrect
Error: Python script failed, check the message in the system console

Exact steps for others to reproduce the error

open the Blend File
Select the cube
Run the Script

import bpy

bpy.ops.object.editmode_toggle()
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.view3d.snap_cursor_to_selected()

Snap_Cursor_Bug.blend

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce RTX 2070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 461.92 **Blender Version** Broken: version: 2.93.1, branch: master, commit date: 2021-06-22 05:57, hash: `1b8d33b18c` Worked: it Failed in 2.83 too **Short description of error** The snap_cursor_to_selected works with the shortcut but Fails in Python with an Error Message: ``` RuntimeError: Operator bpy.ops.view3d.snap_cursor_to_selected.poll() failed, context is incorrect Error: Python script failed, check the message in the system console ``` **Exact steps for others to reproduce the error** - open the Blend File - Select the cube - Run the Script ``` import bpy bpy.ops.object.editmode_toggle() bpy.ops.mesh.select_all(action='SELECT') bpy.ops.view3d.snap_cursor_to_selected() ``` [Snap_Cursor_Bug.blend](https://archive.blender.org/developer/F10224398/Snap_Cursor_Bug.blend)

Leul Mulugeta commented

2021-07-14 22:46:42 +02:00

Added subscriber: @Leul

kursad k commented

2021-07-15 05:04:07 +02:00

Added subscriber: @kursadk

kursad k commented

2021-07-15 05:04:07 +02:00

Unfortunately the context is incorrect message means that you are writing and using this piece of code incorrectly. Most likely you are running the line from a wrong place, or trying to use it with a wrong object. This is a pretty common scripting mistake. Basically this is not a bug rather it is a feature of the Python API.

Turn your script into a real add-on or look into context overriding.

Unfortunately the **context is incorrect** message means that you are writing and using this piece of code incorrectly. Most likely you are running the line from a wrong place, or trying to use it with a wrong object. This is a pretty common scripting mistake. Basically this is not a bug rather it is a feature of the Python API. Turn your script into a real add-on or look into context overriding.

Leul Mulugeta commented

2021-07-15 09:12:20 +02:00

But the problem is if you just use the shortcuts:

Select a Cube
Tab to go to Edit
A to select all
Shift S to snap_cursor_to_selected
everything works as Expected and in the codes shown in the info Viewer will be

bpy.ops.object.editmode_toggle()
bpy.ops.mesh.select_all(action='SELECT')
bpy.ops.view3d.snap_cursor_to_selected()

i just cant use them in Python, hopefully am not missing anything :/

But the problem is if you just use the shortcuts: - Select a Cube - Tab to go to Edit - A to select all - Shift S to snap_cursor_to_selected everything works as Expected and in the codes shown in the **info Viewer** will be ``` bpy.ops.object.editmode_toggle() bpy.ops.mesh.select_all(action='SELECT') bpy.ops.view3d.snap_cursor_to_selected() ``` i just cant use them in Python, hopefully am not missing anything :/

Germano Cavalcante commented

2021-07-15 14:38:11 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-07-15 14:38:11 +02:00

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

Germano Cavalcante closed this issue

2021-07-15 14:38:11 +02:00

Germano Cavalcante commented

2021-07-15 14:38:11 +02:00

bpy.ops.view3d.snap_cursor_to_selected needs to be called in the correct context.
It is possible to have more than one view3d open and the code cannot predict which one to use.
Try overriding the context --> https://docs.blender.org/api/current/bpy.ops.html#overriding-context

In fact this does not seem to be a bug.
For help using Blender, please try one of the community websites: https://www.blender.org/community/

`bpy.ops.view3d.snap_cursor_to_selected` needs to be called in the correct context. It is possible to have more than one view3d open and the code cannot predict which one to use. Try overriding the context --> https://docs.blender.org/api/current/bpy.ops.html#overriding-context In fact this does not seem to be a bug. For help using Blender, please try one of the community websites: https://www.blender.org/community/

Philipp Oeser commented

2021-07-15 14:57:41 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-07-15 14:57:41 +02:00

The thing is: you are running the code in the context of the text editor.

Please check
https://docs.blender.org/api/2.93/bpy.ops.html#execution-context
https://docs.blender.org/api/2.93/bpy.ops.html#overriding-context

So you should be able to override context with something like this:

import bpy

for window in bpy.context.window_manager.windows:
    screen = window.screen

    for area in screen.areas:
        if area.type == 'VIEW_3D':
            override = {'window': window, 'screen': screen, 'area': area}
            bpy.ops.object.editmode_toggle()
            bpy.ops.mesh.select_all(action='SELECT')
            bpy.ops.view3d.snap_cursor_to_selected(override)
            break

This seems to work

The thing is: you are running the code in the context of the text editor. Please check https://docs.blender.org/api/2.93/bpy.ops.html#execution-context https://docs.blender.org/api/2.93/bpy.ops.html#overriding-context So you should be able to override context with something like this: ``` import bpy for window in bpy.context.window_manager.windows: screen = window.screen for area in screen.areas: if area.type == 'VIEW_3D': override = {'window': window, 'screen': screen, 'area': area} bpy.ops.object.editmode_toggle() bpy.ops.mesh.select_all(action='SELECT') bpy.ops.view3d.snap_cursor_to_selected(override) break ``` This seems to work

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snap_cursor_to_selected Fails in Python #89862