diff --git a/lib/RRD.py b/lib/RRD.py
index 3c406ac..4e925a7 100644
--- a/lib/RRD.py
+++ b/lib/RRD.py
@@ -159,7 +159,7 @@ class RRD(object):
                                ds.unknown_sec), "utf-8"))
 
             if b'</cdp_prep>' in line:
-                restore.stdin.write(added_ds_num*b"""
+                restore.stdin.write(added_ds_num * b"""
                         <ds>
                         <primary_value> NaN </primary_value>
                         <secondary_value> NaN </secondary_value>
@@ -173,7 +173,7 @@ class RRD(object):
                 restore.stdin.write(
                     line.replace(
                         b'</row>',
-                        (added_ds_num*b'<v>NaN</v>')+b'</row>'
+                        (added_ds_num * b'<v>NaN</v>') + b'</row>'
                     )
                 )
 
diff --git a/lib/graph.py b/lib/graph.py
index 7b45828..db1259e 100644
--- a/lib/graph.py
+++ b/lib/graph.py
@@ -8,7 +8,7 @@ from lib.nodes import build_mac_table
 
 def import_vis_data(graph, nodes, vis_data):
     macs = build_mac_table(nodes)
-    nodes_a = map(lambda d: 2*[d['primary']],
+    nodes_a = map(lambda d: 2 * [d['primary']],
                   filter(lambda d: 'primary' in d, vis_data))
     nodes_b = map(lambda d: [d['secondary'], d['of']],
                   filter(lambda d: 'secondary' in d, vis_data))
diff --git a/lib/rrddb.py b/lib/rrddb.py
index 57437a7..f1678f5 100644
--- a/lib/rrddb.py
+++ b/lib/rrddb.py
@@ -19,7 +19,7 @@ class RRD(object):
         self.displayTimeGlobal = display_time_global
         self.displayTimeNode = display_time_node
 
-        self.currentTimeInt = (int(time.time())/60)*60
+        self.currentTimeInt = (int(time.time()) / 60) * 60
         self.currentTime = str(self.currentTimeInt)
 
         try: