Here is python script it is program which gets current INTERNET speed from cli and saves it in a python variable
from subprocess import PIPE, Popen
def cmdline(command):
process = Popen(args=command,stdout=PIPE,shell=True)
return process.communicate()[0]
aa=(cmdline("awk '{if(l1){print ($2-l1)/1024,($10-l2)/1024} else{l1=$2; l2=$10;}}' <(grep eth0 /proc/net/dev) <(sleep 1); <(grep eth0 /proc/net/dev)"))
print(str(aa))
gives error
/bin/sh: 1: Syntax error: "(" unexpected
Popen executes its command by default with /bin/sh, the POSIX shell. It does not recognize the bash extension <(...), which leads to your error. The quickest fix is to specify that you want to use /bin/bash as the shell:
process = Popen(args=command, stdout=PIPE, shell=True, executable="/bin/bash")
A better solution would be to stick with a POSIX-compatible command, so that your Python script doesn't rely on bash being installed in any particular location, or at all. Something like
cmd = '''{
grep eth0 /proc/net/dev
sleep 1
grep eth0 /proc/net/dev
} | awk '{if(l1){print ($2-l1)/1024,($10-l2)/1024} else{l1=$2; l2=$10;}}'
'''
aa=(cmdline(cmd))
The best solution would be to figure out how to do what you want in Python itself, instead of embedding a shell script.
/bin/shrather thanbashas the shell and I think<(...)is abash-ism.