Roy Smith <r...@panix.com> writes:
> I need to run a command using subprocess.Popen() and have stdin
> connected to the null device. On unix, I would do:
>
> self.process = subprocess.Popen(argv,
> env=new_env,
> stdout=open(outfile, 'w'),
> stderr=open(errfile, 'w'),
> stdin=open('/dev/null')
> )
Yikes, that's a nasty indentation you've got going on there. I'd be
writing the above as:
self.process = subprocess.Popen(
argv,
env=new_env,
stdout=open(outfile, 'w'),
stderr=open(errfile, 'w'),
stdin=open('/dev/null'),
)
> but that's not portable to windows. Does Python have a portable way
> to get a file object connected to the null device, regardless of what
> operating system you're running on?
Almost: the ‘os.devnull’ attribute is documented (in the documentation
for the ‘os’ module) as “os.devnull is the file path of the null
device ('/dev/null', etc.)”.
So the above becomes:
self.process = subprocess.Popen(
argv,
env=new_env,
stdout=open(outfile, 'w'),
stderr=open(errfile, 'w'),
stdin=open(os.devnull),
)
--
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Ben Finney
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