Farshid Lashkari wrote: > When I pass an empty string to a function is a new string object created > or does python use some global pre-created object? I know python does > this with integer objects under a certain value. For instance, in the > following code is a new string object created for each function call? > > func(0,'') > func(1,'') > func(2,'') > func(3,'') > > I tried the following commands in the interactive shell: > > >> x = '' > >> y = '' > >> x is y > True > >> x = 'hello' > >> y = 'hello' > >> x is y > True > > This leads me to believe that python does reuse existing strings, but > once the variables are removed, does the item still exist in the cache? > It takes far too little evidence to induce belief:
>>> a = "hello" >>> b = "h"+"ello" >>> a is b False >>> c = "hello" >>> b is a False >>> regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
