is_there_systemd() with with

utils.py

@@ -65,13 +65,11 @@ def ns_exec(args, stdin=None):
 
 
 def is_there_systemd():
 def is_there_systemd():
 
 
-    devnull = open(os.devnull, "w")
+    with open(os.devnull, "w") as devnull:
 
 
         try:
         try:
             sp.call(["/bin/systemctl", "--version"], stdout=devnull, stderr=devnull)
             sp.call(["/bin/systemctl", "--version"], stdout=devnull, stderr=devnull)
         except OSError:
         except OSError:
             return False
             return False
-    finally:
-        devnull.close()
 
 
     return True
     return True