On Mon, Dec 8, 2008 at 12:26 AM, Bruno Desthuilliers <[EMAIL PROTECTED]> wrote: > Colin J. Williams a écrit : >> >> [EMAIL PROTECTED] wrote: >>> >>> How can I make a "var" parm, where the called function can modify >>> the value of the parameter in the caller? >>> >>> def f(x): >>> x = x + 1 >>> >>> n = 1 >>> f(n) >>> # n should now be 2 >>> >>> Many TIA!! >>> Mark >>> >>> >> >> Why not run it and see? >> >> Your function returns None. >> >> The function in effect takes a copy of n. > > Nope, it takes the object bound to global name 'n'.
See Also: the earlier heated debate thread over what evaluation strategy Python uses (Survey says!: call-by-object). Cheers, Chris -- Follow the path of the Iguana... http://rebertia.com > > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
