On Aug 29, 7:45 am, zaur <szp...@gmail.com> wrote: > Python 2.6.2 (r262:71600, Apr 16 2009, 09:17:39) > [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin > Type "copyright", "credits" or "license()" for more information.>>> a=1 > >>> x=[a] > >>> id(a)==id(x[0]) > True > >>> a+=1 > >>> a > 2 > >>> x[0] > > 1 > > I thought that += should only change the value of the int object. But > += create new. > Is this intentional?
ints are immutable. But your logic works fine with a mutable object, like a list: >>> a = [1] >>> x = [a] >>> print id(a) == id(x[0]) True >>> a += [1] >>> print a [1, 1] >>> print x[0] [1, 1] What exactly are you trying to do? -- Paul -- http://mail.python.org/mailman/listinfo/python-list