I run into pandas edge cases all the time. pd.concat() failing on empty sequences (just let me specify a default for that case please); .squeeze() not letting m

I run into pandas edge cases all the time. pd.concat() failing on empty sequences (just let me specify a default for that case please); .squeeze() not letting me say, "squeeze down to a series but not a scalar"; .groupby().apply() returning different types depending on how many groups/rows per group there are... it's fine when you know exactly what you have but it's hard using it in a pipeline with that needs to be agnostic about whether there's zero, one, or many data (datums?).