James Stroud wrote: > Bart Willems wrote: >> Dennis Lee Bieber wrote: [...] >> Lists behave as described above, integers and floats don't. >> >> By the way, a classic language like C has features like this too; >> they're called pointers. > > I think that after a += 1, a memory location with a 6 is created and now > a points to that because += has assignment buried in it.
This is the difference between mutable and immutable types. >>> a = 5 >>> b = a >>> a += 1 >>> a 6 >>> b 5 >>> a = [1,2,3,4,5] >>> b = a >>> a += [6,7,8] >>> a [1, 2, 3, 4, 5, 6, 7, 8] >>> b [1, 2, 3, 4, 5, 6, 7, 8] >>> regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden Recent Ramblings http://holdenweb.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
