In article <mailman.15802.1415923204.18130.python-l...@python.org>,
Ben Finney <ben+pyt...@benfinney.id.au> wrote:
> satishmlm...@gmail.com writes:
>
> > import os
> > os.write(1, b'Hello descriptor world\n')
> > OSError: Bad file descriptor
>
> It works fine for me::
>
> >>> import os
> >>> os.write(1, b'Hello descriptor world\n')
> Hello descriptor world
> 23
>
> You don't say which Python, or which version, you're using. In the
> absence of different information, most of us will assume the latest
> stable release of CPython. Currently, that is CPython 3.4.
I don't think this has anything to do with which version of Python he's
using. I think all that's happening is (for some unknown reason), fd 1
is closed before his program runs. You can demonstrate this, for
example, in bash:
$ cat hello.py
import os
os.write(1, b'Hello descriptor world\n')
$ python hello.py
Hello descriptor world
$ 1<&- python hello.py
Traceback (most recent call last):
File "hello.py", line 2, in <module>
os.write(1, b'Hello descriptor world\n')
OSError: [Errno 9] Bad file descriptor
You owe the Oracle 5 minutes of his life back and a cookie for making
him read enough of the bash manual to figure out the syntax to tell it
to close a descriptor.
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