diff --git a/apprecommender/data_collect/collect_user_data.py b/apprecommender/data_collect/collect_user_data.py
index 590d5e7..239d3e1 100755
--- a/apprecommender/data_collect/collect_user_data.py
+++ b/apprecommender/data_collect/collect_user_data.py
@@ -7,12 +7,11 @@
 import logging
 import os
 import re
+import subprocess
 import tarfile
 import time
 import xapian
 
-from subprocess import Popen, PIPE
-
 from apprecommender.app_recommender import AppRecommender
 from apprecommender.config import Config
 from apprecommender.data import get_user_installed_pkgs
@@ -101,10 +100,10 @@ def collect_popcon_submission():
 
     create_popularity_contest_file()
 
-    popcon = Popen('./popularity-contest',
-                   shell=True, stdin=PIPE,
-                   stdout=PIPE,
-                   stderr=PIPE)
+    popcon = subprocess.Popen('./popularity-contest',
+                              shell=True, stdin=subprocess.PIPE,
+                              stdout=subprocess.PIPE,
+                              stderr=subprocess.PIPE)
 
     popcon_output = popcon.stdout.read()
 
@@ -412,7 +411,7 @@ def main():
     collect_user_preferences()
 
     make_tarfile(LOG_PATH + '.tar.gz', LOG_PATH)
-    commands.getoutput('rm -rf {}'.format(LOG_PATH))
+    subprocess.call(['rm', '-rf', LOG_PATH])
 
     print "\n\nFinished: All files and recommendations were collected"
     print "Collect data folder: {0}.tar.gz\n".format(LOG_PATH)