Chris Angelico <ros...@gmail.com> writes: > On Mon, Sep 14, 2015 at 11:22 AM, Akira Li <4kir4...@gmail.com> wrote: >> Steven D'Aprano <st...@pearwood.info> writes: >> >>> On Mon, 14 Sep 2015 09:17 am, Akira Li wrote: >>> >>>> I don't see why the model that can't describe range(1) in Python 3 >>>> pretends to be complete. >>> >>> >>> Please explain. >>> >>> range(1) returns a range instance. What is hard about that? >> >> Look at the last example: >> http://thread.gmane.org/gmane.comp.python.general/782626/focus=782704 > > Still not sure what the problem is. As per Python's object model, the > lists contain references to range objects. a contains two references > to the same range object, b contains references to each of two > distinct range objects. What of it?
For me, there is no problem. "parcel tags" [1], "box and arrows"[2] are all the same (note: "labelled box"[3] that may contain an object is a different model). The talk about being "complete" is caused by the following quote from Random832 message [4]: If the "parcel tags" model can't show it, then the "parcel tag" model clearly is not a correct and complete depiction of how Python actually works. The purpose of the examples in [5] is to demonstate that neither models are "complete" i.e., there is (obviously) behavior of a Python program that they can't describe. [1] http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html#python-has-names [2] http://www.pythontutor.com/visualize.html#code=a0+%3D+a1+%3D+%5B1,+2%5D%0Ab0+%3D+%5B1,+2%5D%0Ab1+%3D+%5B1,+2%5D%0Aa+%3D+%5Ba0,+a1%5D%0Ab+%3D+%5Bb0,+b1%5D%0Adel+a0,+a1,+b0,+b1%0A&mode=display&origin=opt-frontend.js&cumulative=false&heapPrimitives=false&textReferences=false&py=3&rawInputLstJSON=%5B%5D&curInstr=6 [3] http://python.net/~goodger/projects/pycon/2007/idiomatic/handout.html#other-languages-have-variables [4] http://thread.gmane.org/gmane.comp.python.general/782626/focus=782645 [5] http://thread.gmane.org/gmane.comp.python.general/782626/focus=782704 -- https://mail.python.org/mailman/listinfo/python-list
