Ian Kelly wrote: > On Fri, Nov 14, 2014 at 12:36 AM, Cameron Simpson <c...@zip.com.au> wrote: >> On 13Nov2014 15:48, satishmlm...@gmail.com <satishmlm...@gmail.com> >> wrote: >>> >>> import sys >>> for stream in (sys.stdin, sys.stdout, sys.stderr): >>> print(stream.fileno()) >>> >>> >>> io.UnsupportedOperation: fileno >>> >>> Is there a workaround? >> >> >> The first workaround that suggests itself it to use a more modern Python. >> I've got 3.4.2 here, and it goes: >> >> Python 3.4.2 (default, Nov 5 2014, 21:19:51) >> [GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.54)] on darwin >> Type "help", "copyright", "credits" or "license" for more information. >> >>> import sys >> >>> for stream in (sys.stdin, sys.stdout, sys.stderr): >> ... print(stream.fileno()) >> ... >> 0 >> 1 >> 2 >> >>> >> >> In short, in 3.4.2 it just works. > > Why do you think the Python version has anything to do with it?
Because the OP states that he is using Python 3.1 (look at the subject line) and it doesn't work in 3.1. For what it is worth, I cannot confirm that alleged behaviour: steve@orac:~$ python3.1 -c "import sys; print(sys.stdout.fileno())" 1 I suspect that the OP may be using an IDE which does something funny to sys.stdout etc., or perhaps he has accidentally shadowed them. The OP failed to copy and paste the actual traceback, so who knows what is actually happening? -- Steven -- https://mail.python.org/mailman/listinfo/python-list
