Azure blob storage prepends a '/' to the blob names when the prefix is None

[shikharsg]

Azure blob storage prepends a '/' to the blob names, even when the prefix is None. Code sample:

Minimal, reproducible code sample

This code needs to connect to Azure Blob (the sample below connects to a local emulator)

>>> import zarr
>>> store = zarr.ABSStore('test', prefix=None, blob_service_kwargs={'is_emulated':True})
>>> g = zarr.open_group(store)
>>> ## list all blobs in the container
>>> print([blob.name for blob in store.client.list_blobs('test')])
['/.zgroup']

which shows up in the storage explorer like this:

There should ideally be no '/' before the .zgroup and it should look like this:

>>> import zarr
>>> store = zarr.ABSStore('test', prefix=None, blob_service_kwargs={'is_emulated':True})
>>> g = zarr.open_group(store)
>>> ## list all blobs in the container
>>> print([blob.name for blob in store.client.list_blobs('test')])
['.zgroup']

Will submit a PR for this in a bit

[tjcrone]

It's not clear to me why you would want .zgroup to be directly under a blob container. The blob container is not a Zarr group.

[shikharsg]

Fixed in PR #526