--- a/silvermirror/unify.py	Tue May 12 18:33:30 2015 -0700
+++ b/silvermirror/unify.py	Mon Feb 20 15:02:50 2017 -0800
@@ -13,8 +13,9 @@
 from martini.config import ConfigMunger
 from pkg_resources import iter_entry_points
 from pprint import pprint
-from utils import home
-from utils import ip_addresses
+from .utils import home
+from .utils import ip_addresses
+
 
 def make_config(filename):
     # XXX needed?
@@ -22,6 +23,8 @@
 
 
 def read_config(filename):
+    """read configuration `filename`"""
+
     config = ConfigMunger(filename).dict()
 
     ### main configuration

--- a/silvermirror/utils.py	Tue May 12 18:33:30 2015 -0700
+++ b/silvermirror/utils.py	Mon Feb 20 15:02:50 2017 -0800
@@ -2,11 +2,14 @@
 
 import netifaces
 import os
+import sys
+
 
 def home():
     # XXX needed? better way of doing?
     return os.environ['HOME']
 
+
 def ip_addresses():
     """dictionary of ip4 addresses for the machine"""
     interfaces = []
@@ -22,6 +25,11 @@
                  for i in interfaces
                  ])
 
-if __name__ == '__main__':
+
+def main(args=sys.argv[1:]):
     for name, value in sorted(ip_addresses().items()):
-        print '%s : %s' % (name, value)
+        print ('%s : %s' % (name, value))
+
+
+if __name__ == '__main__':
+    main()