Create util directory

route-0.py

@@ -6,8 +6,8 @@ import os
 from mininet.net import Mininet
 from mininet.cli import CLI
 
-from router import Router
-from experiment import Experiment
+from util.router import Router
+from util.experiment import Experiment
 
 
 def start_daemon(node, daemon, conf_dir):

util/experiment.py

@@ -1,5 +1,6 @@
 import importlib
 import os
+import sys
 
 
 class Experiment(object):
@@ -14,7 +15,7 @@ class Experiment(object):
     """
 
     def __init__(self, topology, scenario):
-        root_dir = os.path.dirname(os.path.realpath(__file__))
+        root_dir = os.path.dirname(sys.modules['__main__'].__file__)
 
         # Check if the topology directory exists.
         topo_dir = os.path.join(root_dir, "topology/{}".format(topology))