issue_comments: 269089778

I updated the code and tested it in my project - it works fine. Any suggestions before I start integrating it inside xarray.broadcast()?

``` def broadcast_scalar_coords(*args, exclude=()): """Broadcast scalar coords whenever they're unambiguous, and remove them when they are ambiguous. This allows replicating the behaviour of addition or moltiplication of xarrays in concatenation. """ unambiguous = {} ambiguous = set() for arg in args: for k, v in arg.coords.items(): if k in exclude: continue # non-scalar coords are automatically ambiguous if v.shape == (): if k not in ambiguous: v = v.values.tolist() if unambiguous.get(k, v) != v: del unambiguous[k] ambiguous.add(k) else: unambiguous[k] = v else: ambiguous.add(k) unambiguous.pop(k, None)

args = tuple(arg.copy(deep=False) for arg in args)
for arg in args:
    for k, v in unambiguous.items():
        arg.coords[k] = v
    for k in ambiguous:
        if k in arg.coords and arg.coords[k].shape == ():
            del arg.coords[k]
return args

```