> > By the way, `df[20:50,:]` is *not* a subset of `df`, but a *copy* of a > subset of `df`. > Since `df` doesn't have any column whose name is "row", how could you > expect the "row" to be an index. >
Because when you get the DataFrame back, there is a column called "Row" that looks like an index. As a user, if it looks like an index, you will try to use it accordingly. And that is indeed the way it works in R and pandas. You have to separate the way things work internally to the way the user will perceive certain features.
