I meant it only in the superficial sense, that the call of len() is called as len(foo), not foo.len(). I guess this is another example of why using the term "o

I meant it only in the superficial sense, that the call of len() is called as len(foo), not foo.len(). I guess this is another example of why using the term "object-oriented" at all can be unhelpful, as it may mean so many different things to different people depending on the particular situation.