https://www.youtube.com/watch?v=pNe1wWeaHOU&list=PLYI8318YYdkCsZ7dsYV01n6TZhXA6Wf9i&index=1 Thank you, -Alex Goretoy http://launchpad.net/~a1g
On Wed, Sep 6, 2017 at 7:18 PM, Chris Angelico <ros...@gmail.com> wrote: > On Wed, Sep 6, 2017 at 10:11 PM, Rustom Mody <rustompm...@gmail.com> wrote: >> On Wednesday, September 6, 2017 at 5:08:20 PM UTC+5:30, Steve D'Aprano wrote: >>> On Wed, 6 Sep 2017 07:13 pm, Rustom Mody wrote: >>> >>> >>> > Can you explain what "id" and "is" without talking of memory? >>> >>> Yes. >>> >>> id() returns an abstract ID number which is guaranteed to be an integer, and >>> guaranteed to be distinct for all objects which exist at the same time. >>> When an >>> object ceases to exist, its ID number may be re-used. >>> >>> `is` compares the two operands for identity. If the two operands are the >>> same >>> object, `is` returns True, if they are distinct objects, `is` returns False. >> >>>>> a = (1,2) >>>>> b = (1,2) >>>>> a is b >> False >>>>> x = 1 >>>>> y = 1 >>>>> x is y >> True >> >> a seems to be as 'same' to b as x is to y >> Python seems to think otherwise >> >> Evidently your ‘same’ is not the same as mine?? > > *facepalm* > > I got nothing to say to you. Have you been on this list all this time > and still don't understand that Python sometimes optimizes immutables? > > ChrisA > -- > https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
