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Please confirm that this PR has done the following:
Description of PR
In the existing implementation of
set_meta()
, passing over a non-valid index (e.g., a pd.DataFrame) was simply ignored without warning or error. This PR is a clean-up in the sense that if there is anindex
arg, it will be used and an error raised if it cannot be coerced in a meaningful way.In addition, the function now also takes a
pd.DataFrame
with columns['model', 'scenario']
as validindex
arg.