That's it. I am calling my own program and not coreutils' sort, what explains the unrequested output. Many thanks.
Cheers, Kay On 16 Jun., 22:16, Piet van Oostrum <p...@cs.uu.nl> wrote: > >>>>> kmw <wuerz...@gmail.com> (k) wrote: > >k> Hi, > >k> I wanted to write a simple script (in 5 minutes or so) which replaces > >k> the option '+1' given to the command 'sort' by '-k 2' and than runs > >k> 'sort' with the modified argument list. After two hours I am giving up > >k> and ask you for help. This is what I tried (please excuse the verbose > >k> code, it is due to my various efforts to understand the error): > > [snip] > > >k> Please note the unrequested output of '<type 'NoneType'>'. The strange > >k> thing about this all is the fact that the whole thing works as > >k> expected when typed into the interpreter. I would be glad if anyone > >k> could help. > > MRAB has already given you some insight, I hope. > But are you aware that you are calling your own program again? > Or did you want to call the standard sort program? In that case you > shouldn't call ./sort as it is in argv[0], but just sort (assuming '.' > is not in your PATH) or the full path, like /usr/bin/sort. > -- > Piet van Oostrum <p...@cs.uu.nl> > URL:http://pietvanoostrum.com[PGP 8DAE142BE17999C4] > Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
