Terry Reedy <tjre...@udel.edu>: > On 2/22/2015 4:25 PM, Marko Rauhamaa wrote: >> This is a true statement: >> >> If X is Y, then id(X) == id(Y). >> >> However, this is generally not a true statement: >> >> If X is Y, then id(X) is id(Y). > > If X and Y exist at the *same time*, then (X is Y) == (id(X) is id(Y)).
Sorry, you're wrong: Python 3.3.2 (default, Dec 4 2014, 12:49:00) [GCC 4.8.3 20140911 (Red Hat 4.8.3-7)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> x = "alksjdlfkajsf" >>> id(x) is id(x) False >>> (x is x) == (id(x) is id(x)) False Marko -- https://mail.python.org/mailman/listinfo/python-list
