On Feb 2, 9:10 pm, bearophileH... at lycos.com wrote: > Steven Bethard: > > > It also doesn't build the unnecessary intermediate tuples: > > I see, but can't the interpreter improved to remove similar > intermediate tuples anyway? Do you mean the compiler? > Is this a difficult thing to do? Yes, due to the HDNP (Highly Dynamic Nature of Python). -- Arnaud