diff --git a/misc_scripts/cgroup.py b/misc_scripts/cgroup.py
index 9302536..1bfaa1a 100644
--- a/misc_scripts/cgroup.py
+++ b/misc_scripts/cgroup.py
@@ -3,16 +3,13 @@
 import subprocess
 
 process = subprocess.Popen(['rmdir', '/sys/fs/cgroup/memory/nn'], stdout=subprocess.PIPE)
-out, err = process.communicate()
 process = subprocess.Popen(['mkdir', '-p', '/sys/fs/cgroup/memory/nn'], stdout=subprocess.PIPE)
-out, err = process.communicate()
 
 f = open('/sys/fs/cgroup/memory/nn/memory.limit_in_bytes', 'w')
 f.write('65536')
 f.close()
 
 process = subprocess.Popen(['echo', '$$>/sys/fs/cgroup/memory/nn/tasks'], stdout=subprocess.PIPE)
-out, err = process.communicate()
 process = subprocess.Popen(['dd','if=/dev/zero','of=./ff', 'oflag=direct', 'count=10000'], stdout=subprocess.PIPE)
 out, err = process.communicate()