I am using Python 3.4.3. What am I trying to do is, storing a cmd command's output into a variable without printing that into command line. Here I found the answer but it works on the old version but on 3.4.3, variable "var" contains some random characters. And for example if I try to test that with the command "dir", it prints a mess.
import subprocess
from subprocess import Popen, PIPE
var = subprocess.Popen(COMMAND, stdin = PIPE, stdout = PIPE, stderr = PIPE).communicate()[1]
print(var)
If I understood well you just want to run an external command and get the output into a variable.
import subprocess
def foo():
return subprocess.Popen(COMMAND.split(), stdout=subprocess.PIPE).communicate()[0]
From the subprocess documentation :
Replacing /bin/sh shell backquote
---------------------------------
output=`mycmd myarg`
==>
output = Popen(["mycmd", "myarg"], stdout=PIPE).communicate()[0]
Note that the COMMAND.split() is a bit... tricky. For example :
var1 = subprocess.Popen(['echo', '"Hey', 'StackOverflow!"'], stdout=subprocess.PIPE).communicate()[0]
# String contained in var1: "Hey StackOverflow!"\n
var2 = subprocess.Popen(['echo', 'Hey StackOverflow!'], stdout=subprocess.PIPE).communicate()[0]
# String contained in var2: Hey StackOverflow!\n
var1 != var2
# True
subprocess.check_output does what you want: https://docs.python.org/2/library/subprocess.html#subprocess.check_output
