No plugin found capable of reading '/path/to/Shapes.svg'

[npielawski]

🐛 Bug

I am a beginner so perhaps the solution is obvious, but it seems that when saving a shapes layer, the default extension is svg (maybe there are other suitable formats?) and it is not possible to load the said svg later on.

To Reproduce

Steps to reproduce the behavior:

1. Create some shapes
2. Save the shapes as an svg file
3. Load the svg file

The error is:
ValueError: No plugin found capable of reading '/Path/to/result/Shapes.svg'.

Expected behavior

The shapes should be loaded and plotted on the canvas.

Environment

• Please copy and paste the information at napari info option in help menubar here:
  napari: 0.4.11
  Platform: macOS-11.5.2-x86_64-i386-64bit
  System: MacOS 11.5.2
  Python: 3.9.6 | packaged by conda-forge | (default, Jul 11 2021, 03:36:15) [Clang 11.1.0 ]
  Qt: 5.15.2
  PyQt5: 5.15.4
  NumPy: 1.21.2
  SciPy: 1.7.1
  Dask: 2021.08.1
  VisPy: 0.8.1

OpenGL:

• GL version: 2.1 Metal - 71.7.1
• MAX_TEXTURE_SIZE: 16384

Screens:

• screen 1: resolution 1280x800, scale 2.0

Plugins:

• console: 0.0.4

• napari-tissuumaps: 0.0.3

• scikit-image: 0.4.11

• svg: 0.1.5

• Any other relevant information:

Additional context

I could create a script to procedurally add points, and that worked. Saving the svg does not produce any error. I don't know if the feature is not implemented (feature request?) or if it is a bug.

[sofroniewn]

Hi @npielawski I think right now reading from svg has not been implemented, see napari/napari-svg#4, but we really should do that. I think there might be a way to save shapes as a csv with our builtin readers. Maybe @DragaDoncila can take a look at this too

[psobolewskiPhD]

Just in case anyone comes across this: the default saving of a shapes layer is now csv and Shapes do roundtrip: you can save a Shapes layer to .csv and then drag-and-drop to get your Shapes layer back--alas without colors.
SVG still cannot be read by napari out-of-the-box. I've made a PR to update the info on napari-svg so it doesn't suggest we can read svg: napari/napari-svg#37