Granted that the behavior is inconsistent, but I think it’s easy to imagine cases where this is convenient. Anyway, to get a DataFrame every time, just pass a list to loc
. There are other ways, but in my opinion this is the cleanest.
In [2]: type(df.loc[[3]])
Out[2]: pandas.core.frame.DataFrame
In [3]: type(df.loc[[1]])
Out[3]: pandas.core.frame.DataFrame