On Fri, Nov 02, 2007 at 11:13:00AM -0400, Jim Hendricks wrote regarding Re: python newbie: > > BartlebyScrivener wrote: > > On Nov 2, 8:51 am, Jim Hendricks <[EMAIL PROTECTED]> wrote: > >> New to python, programming in 15 or so langs for 24 years. > >> > >> Couple of questions the tuts I've looked at don't explain: > > > > Did you look at THE tut? You would seem to be the perfect reader for > > it, because you are already a programmer. > > > > http://docs.python.org/tut/node6.html#SECTION006600000000000000000 > > > > rd > > > > I initially looked at THE tut, and it came across so techy that it's > such a slow read. Therefore, I looked to other tuts that were very easy > reads and could give me the basic lowdown of the language. Problem of > course is the easy read tuts don't get into the details. > > That said, I looked at the section of the tutorial you provided (thanks) > and I am still confused. It specifies a global var cannot be assigned > unless it's specified in the global statement. > > Here's an example of what I am asking: > > def my_function(): > global x > > x = open( .... > > before calling my_function, x does not exist in my program. So, my > question is in my_function, the combination of using the global > statement, then implicitly creating x via assignment to the result of > the open function, is x created in the global namespace?
Yes. >>> y Traceback (most recent call last): File "<pyshell#8>", line 1, in <module> y NameError: name 'y' is not defined >>> def f(): global y y = 123 >>> f() >>> y 123 >>> Remember, the interactive interpreter is your friend. Just type 'python' at the command line and hammer away. (It's even better through a decent IDE). Oh yeah, you have to actually call f before y will get defined. Cheers, Cliff -- http://mail.python.org/mailman/listinfo/python-list