Python: active_shape_key is read-only so you can't easily set the active shape key using its name #57961

New Issue

Henrik Berglund · 2018-11-20T17:21:33+01:00

Henrik Berglund commented

2018-11-20 17:21:33 +01:00

System Information
Win8, GTX1070

Blender Version
Broken: 2.79

Short description of error

When trying to set the active shapekey by name using active_shape_key (from an object) I get an error: AttributeError: bpy_struct: attribute "active_shape_key" from "Object" is read-only

Setting the active shape key with an index using active_shape_key_index does work, so why can't you set the active shape key by name (string) using active_shape_key?

(If a string isn't desirable data.shape_keys.key_blocks[name] would be fine too)

Exact steps for others to reproduce the error
From default cube scene:

Select the cube object and add two shape keys.
Open the python console.
Type C.selected_objects- .active_shape_key = "Basis"
You get the above error.
Type C.selected_objects- .active_shape_key_index = 0
You successfully changed the active shape key.

Expected: both should have the same result.

**System Information** Win8, GTX1070 **Blender Version** Broken: 2.79 **Short description of error** When trying to set the active shapekey by name using active_shape_key (from an object) I get an error: AttributeError: bpy_struct: attribute "active_shape_key" from "Object" is read-only Setting the active shape key with an index using active_shape_key_index does work, so why can't you set the active shape key by name (string) using active_shape_key? (If a string isn't desirable data.shape_keys.key_blocks[name] would be fine too) **Exact steps for others to reproduce the error** From default cube scene: 1. Select the cube object and add two shape keys. 2. Open the python console. 3. Type C.selected_objects- [x].active_shape_key = "Basis" 4. You get the above error. 5. Type C.selected_objects- [x].active_shape_key_index = 0 6. You successfully changed the active shape key. Expected: both should have the same result.

Henrik Berglund commented

2018-11-20 17:21:33 +01:00

Added subscriber: @cyaoeu

Philipp Oeser commented

2018-11-20 21:57:27 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2018-11-20 21:57:27 +01:00

Changed status from 'Open' to: 'Archived'

Philipp Oeser closed this issue

2018-11-20 21:57:27 +01:00

Philipp Oeser self-assigned this 2018-11-20 21:57:27 +01:00

Philipp Oeser commented

2018-11-20 21:57:27 +01:00

While there is always room for improvement, I wouldnt consider this a bug.

shape_keys.key_blocks.find("Basis") will give you the index (which you can use to set active_shape_key_index)

Thx for the report, but closing.

While there is always room for improvement, I wouldnt consider this a bug. shape_keys.key_blocks.`find`("Basis") will give you the index (which you can use to set active_shape_key_index) Thx for the report, but closing.

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Python: active_shape_key is read-only so you can't easily set the active shape key using its name #57961