[got some free time, catching up to threads two months old] In article <50475822$0$6867$e4fe5...@news2.news.xs4all.nl>, Hans Mulder <han...@xs4all.nl> wrote: >On 5/09/12 15:19:47, Franck Ditter wrote: >> >> - I should have said that I work with Python 3. Does that matter ? >> - May I reformulate the queston : "a is b" and "id(a) == id(b)" >> both mean : "a et b share the same physical address". Is that True ? > >Yes. > >Keep in mind, though, that in some implementation (e.g. Jython), the >physical address may change during the life time of an object. > >It's usually phrased as "a and b are the same object". If the object >is mutable, then changing a will also change b. If a and b aren't >mutable, then it doesn't really matter whether they share a physical >address.
That last sentence is not quite true. intern() is used to ensure that strings share a physical address to save memory. -- Aahz (a...@pythoncraft.com) <*> http://www.pythoncraft.com/ "....Normal is what cuts off your sixth finger and your tail..." --Siobhan -- http://mail.python.org/mailman/listinfo/python-list
