On 16/05/2016 12:08 πμ, Chris Angelico wrote:
> On Mon, May 16, 2016 at 1:49 AM, Pavlos Parissis
> <pavlos.paris...@gmail.com> wrote:
>> I use subprocess.check_output like this:
>>
>> cmd = [
>> '/sbin/ip',
>> 'address',
>> 'show',
>> 'dev',
>> "{}".format(self.config['interface']),
>> 'to',
>> "{}".format(self.config['ip_prefix']),
>> ]
>
> Unrelated to your problem: "{}".format(x) is the same as str(x), and
> if x is already a string, it does exactly nothing. Most likely you can
> just put your configs straight in there.
> Thanks for the tip, I will change it as you suggested. >> try: >> out = subprocess.check_output( >> cmd, >> universal_newlines=True, >> timeout=1) >> except subprocess.CalledProcessError as error: >> return True >> except subprocess.TimeoutExpired: >> return True >> else: >> if self.config['ip_prefix'] in out: >> return True >> else: >> return False >> >> >> and I get the following exception: >> >> ValueError: Invalid file object: <_io.TextIOWrapper name=11 >> encoding='UTF-8'> > > Searching the CPython sources for that exception shows one hit: > selectors.py, where it converts a file object to an integer file > descriptor. (You could have helped out by showing us the full > traceback.) I did, https://gist.github.com/unixsurfer/67db620d87f667423f6f6e3a04e0bff5 > Is it possible you were running out of file descriptors, > or in some other way unable to create the pipe? I don't think as I see right now only 8 FDs: sudo ls -1 /proc/22706/fd|wc 8 8 16 Thanks, Pavlos
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