PermissionError when using `arviz.InferenceData.to_netcdf()` to overwrite existing file.

[mattiasthalen]

Describe the bug Exits with PermissionError when trying to use arviz.InferenceData.to_netcdf() to overwrite an existing file.

To Reproduce Generate inference data. Export using to_netcdf(). Export again and get error.

Expected behavior Existing file is overwritten.

Additional context Arviz 0.11.2 Google Colaboratory using TPU.

Error message PermissionError: [Errno 13] Permission denied: b'/content/drive/MyDrive/Colab Notebooks/Pyro: RepOne Strength/export/velocity_inference_mcmc.nc

[ahartikainen]

I wonder if we leave file open?

[mattiasthalen]

I wonder if we leave file open?

Well, the source shows that the final step, before return, is data.close().

[aloctavodia]

Hi @mattiasthalen is this still an issue? If you are observing this when saving, then loading and then saving again then you can try setting az.rcParams["data.load"] = "eager"

[opherdonchin]

I'm still getting this issue and when I looked for the files in the Windows resource manager, they seemed to still be open. Perhaps net_cdf is not closing the files?

[bonh]

For me too.

Edit: permission denied only if inside import pymc as pm; with pm.Model() as model: [...].

Edit2: No, something else is going on. Sometimes it failed, and sometimes it did not...