View list of cached open files

[dcherian]

Is there a way to view the list of currently open, cached files? And possibly force-close them?

I keep running to write errors because a file is open in the cache, and I can't remember all the variables that depend on it.

[shoyer]

It's private API, but you can import FILE_CACHE from xarray.backends.file_manager. You can just delete entries from that mapping (e..g, using del) -- the files will be automatically closed.

#2595 is experiment to close files automatically when referencing objects are garbage collected, which feels like a generally good to idea to him. But it doesn't seem to passing on Travis (it works on my Macbook) -- RasterIO tests are stalling out.

[fujiisoup]

Closed via #2595