Python Template demo script error #63504

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Marco · 2019-04-11T22:27:14+02:00

Marco commented

2019-04-11 22:27:14 +02:00

System Information
Operating system: Ubuntu 18.04.2 64bit
Graphics card: AMD RX 580 8GB

Blender Version
Broken: 2.80.55, a3b88c917299, 2019-04-10
Broken also in 2.79b

Short description of error
This error appears when running a demo template python script included in Blender

raise KeyError("key {name!r} already exists")

Exact steps for others to reproduce the error

Open Blender
Go in Scripting workspace
Select ui_previews_dynamic_enum.py from Templates > Python > UI Previews Dynamic Enum
Run it, you will find the panel in the object properties window
Now choose a directory for the icons to load
Choose another directory
And choose the directory you have chosen before (point 5)
The following error appears:

Traceback (most recent call last):
  File "/ui_previews_dynamic_enum.py", line 54, in enum_previews_from_directory_items
  File "/home/marco/Scaricati/blender-2.80-a3b88c917299-linux-glibc224-x86_64/2.80/scripts/modules/bpy/utils/previews.py", line 97, in load
    raise KeyError("key {name!r} already exists")
KeyError: 'key {name!r} already exists'
File "/ui_previews_dynamic_enum.py", line 26, in enum_previews_from_directory_items

**System Information** Operating system: Ubuntu 18.04.2 64bit Graphics card: AMD RX 580 8GB **Blender Version** Broken: 2.80.55, a3b88c917299, 2019-04-10 Broken also in 2.79b **Short description of error** This error appears when running a demo template python script included in Blender ``` raise KeyError("key {name!r} already exists") ``` ![Screenshot.jpg](https://archive.blender.org/developer/F6932169/Screenshot.jpg) **Exact steps for others to reproduce the error** 1) Open Blender 2) Go in Scripting workspace 3) Select ui_previews_dynamic_enum.py from Templates > Python > UI Previews Dynamic Enum 4) Run it, you will find the panel in the object properties window 5) Now choose a directory for the icons to load 6) Choose another directory 7) And choose the directory you have chosen before (point 5) The following error appears: ``` Traceback (most recent call last): File "/ui_previews_dynamic_enum.py", line 54, in enum_previews_from_directory_items File "/home/marco/Scaricati/blender-2.80-a3b88c917299-linux-glibc224-x86_64/2.80/scripts/modules/bpy/utils/previews.py", line 97, in load raise KeyError("key {name!r} already exists") KeyError: 'key {name!r} already exists' File "/ui_previews_dynamic_enum.py", line 26, in enum_previews_from_directory_items ```

Marco commented

2019-04-11 22:27:14 +02:00

Added subscriber: @nacioss

Jeroen Bakker commented

2019-04-12 08:51:14 +02:00

Added subscriber: @Jeroen-Bakker

Marco commented

2019-04-12 13:17:38 +02:00

And i found a solution to the problem:
just add these lines of code after line 53 of the script

            icon = pcoll.get(name)
            if not icon:
                thumb = pcoll.load(name, filepath, 'IMAGE')
            else:
                thumb = pcoll[name]

So that it checks if the icons have already been imported.
This could be helpful to others who need to make a dynamic enum.

And i found a solution to the problem: just add these lines of code after line 53 of the script ``` icon = pcoll.get(name) if not icon: thumb = pcoll.load(name, filepath, 'IMAGE') else: thumb = pcoll[name] ``` ![Screenshot.jpg](https://archive.blender.org/developer/F6934674/Screenshot.jpg) So that it checks if the icons have already been imported. This could be helpful to others who need to make a dynamic enum.

blender-admin commented

2019-04-12 14:00:57 +02:00

This issue was referenced by blender/blender@f3fc8271b8

This issue was referenced by blender/blender@f3fc8271b81f7c23ba42356a95bbe487e1e339ae

Philipp Oeser commented

2019-04-12 14:07:36 +02:00

Added subscriber: @lichtwerk

Philipp Oeser self-assigned this 2019-04-12 14:07:36 +02:00

Philipp Oeser commented

2019-04-12 14:07:36 +02:00

lgtm, will commit, thx for the fix!