On Aug 11, 9:31 am, Pinku Surana <sura...@gmail.com> wrote: > On Aug 11, 12:07 pm, fuglyducky <fuglydu...@gmail.com> wrote: > > > > > I am a complete newbie to Python (and programming in general) and I > > have no idea what I'm missing. Below is a script that I am trying to > > work with and I cannot get it to work. When I call the final print > > function, nothing prints. However, if I print within the individual > > functions, I get the appropriate printout. > > > Am I missing something??? Thanks in advance!!!! > > > ################################################ > > # Global variable > > sample_string = "" > > > def gen_header(sample_string): > > HEADER = """ > > mymultilinestringhere > > """ > > > sample_string += HEADER > > return sample_string > > > def gen_nia(sample_string): > > NIA = """ > > anothermultilinestringhere > > """ > > > sample_string += NIA > > return sample_string > > > gen_header(sample_string) > > gen_nia(sample_string) > > > print(sample_string) > > There are 2 problems with your program. > > (1) If you want to use a global variable in a function, you have to > add the line "global sample_string" to the beginning of that > function. > > (2) Once you do (1), you will get an error because you've got > sample_string as a global and a function parameter. Which one do you > want to use in the function? You should change the name of the > parameter to "sample" to solve that confusion. > > Here's the result, which works for me: > > sample_string = "" > def gen_header(sample): > global sample_string > HEADER = """ > mymultilinestringhere > """ > sample_string = sample + HEADER > return sample_string > def gen_nia(sample): > global sample_string > NIA = """ > anothermultilinestringhere > """ > sample_string = sample + NIA > return sample_string > gen_header(sample_string) > gen_nia(sample_string) > print(sample_string)
Thanks! That did the trick. I am a bit confused though. I tried to follow a sample in a book (which works) where I didn't have to 1) pass the global variable as a parameter into the function, 2) did not have to define the global variable within the function. I apologize if this is a super stupid question but if it is global, why do I have to pass it into the function? Shouldn't the global variable be accessible from anywhere??? -- http://mail.python.org/mailman/listinfo/python-list
