How to get the handle to the root object from a group object?

[jgostick]

Sorry for the noob question, but let's say I have created the following:

# Top level group
root = zarr.group()
g1 = root.create_group('papa')
g1['some data'] = np.ones(10)

# Now a sub-group
g2 = g1.create_group('son')
g2['more data'] = np.arange(20)

Now my question is: if I only have the handle to g2 (like it gets passed into a function) can I find g1? I'm imagining a syntax like this:

def func(g2):
    g1 = g2.get_handle_to_root_group_which_I_belong()
    # some stuff with g1 and g2 data
    return g2

You may be wondering why I don't just pass g1 into the function. I am evaluating ZARR for use in our project OpenPNM, and it could actually work as a drop-in replacement if this is possible.

Thanks for your time and thanks for sharing this impressive library.

[rabernat]

This is a good question @jgostick. The API does not currently offer a way to do this afaik. But that would be a very reasonable feature request.