On 12/21/2014 12:31 AM, Chris Angelico wrote:
On Sun, Dec 21, 2014 at 4:14 PM, CM <cmpyt...@gmail.com> wrote:
I ran it in IDLE with Python 2.7.8 and got:
Traceback (most recent call last):
File "C:/Python27/helloworld.py", line 39, in <module>
lambda _, __, ___, ____, _____, ______, _______, ________: _
File "C:/Python27/helloworld.py", line 21, in <lambda>
_))) + (_____ << ______) + (_ << ___)
OSError: [Errno 9] Bad file descriptor
Yes, because - like most "Hello world" programs - it attempts to write
to stdout. This interferes with IDLE and the way it captures output
for the graphical environment.
Just to be clear, writing to sys.stdout works fine in Idle.
>>> import sys; sys.stdout.write('hello ')
hello #2.7
In 3.4, the number of chars? bytes? is returned and written also.
Whether you mean something different by 'stdout' or not, I am not sure.
The error is from writing to a non-existent file descriptor.
The os 'file descriptor functions are unix functions. Many but not all
also work on Windows. I do not believe that was true on msdos.
According to the os doc, they do not work on osx. Python io streams are
not required to have a file descriptor.
--
Terry Jan Reedy
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