New submission from mrjbq7 <mrj...@users.sourceforge.net>: There are a couple arithmetic operations that idempotent, where the returned python object is the same python object as the input.
For example, given a number: >>> x = 12345 The abs() builtin returns the same number object if it is already a positive value: >>> id(x) 17124964 >>> id(abs(x)) 17124964 The "multiply by zero" operation returns a single "zero" object: >>> id(x * 0) 16794004 >>> id(x * 0) 16794004 But, the "multiply by 1" or "divide by 1" does not: >>> id(x * 1) 17124928 >>> id(x * 1) 17124880 >>> id(x / 1) 17203652 >>> id(x / 1) 17124952 ---------- messages: 91479 nosy: mrjbq7 severity: normal status: open title: "x / 1" and "x * 1" should return x _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue6684> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
