diff --git a/pyinventorymgr/inventory_items.py b/pyinventorymgr/inventory_items.py
index 168e3d6..1c0a5f7 100644
--- a/pyinventorymgr/inventory_items.py
+++ b/pyinventorymgr/inventory_items.py
@@ -2,6 +2,7 @@
 
 import os
 import sys
+
 # TODO: openbmc/openbmc#2994 remove python 2 support
 try:  # python 2
     import gobject
@@ -14,81 +15,76 @@
 from obmc.dbuslib.bindings import get_dbus, DbusProperties, DbusObjectManager
 
 
-INTF_NAME = 'org.openbmc.InventoryItem'
-DBUS_NAME = 'org.openbmc.Inventory'
+INTF_NAME = "org.openbmc.InventoryItem"
+DBUS_NAME = "org.openbmc.Inventory"
 
 FRUS = {}
 
 
 class Inventory(DbusProperties, DbusObjectManager):
     def __init__(self, bus, name):
-        super(Inventory, self).__init__(
-            conn=bus,
-            object_path=name)
+        super(Inventory, self).__init__(conn=bus, object_path=name)
 
 
 class InventoryItem(DbusProperties):
     def __init__(self, bus, name, data):
-        super(InventoryItem, self).__init__(
-            conn=bus,
-            object_path=name)
+        super(InventoryItem, self).__init__(conn=bus, object_path=name)
 
         self.name = name
 
-        if 'present' not in data:
-            data['present'] = 'False'
-        if 'fault' not in data:
-            data['fault'] = 'False'
-        if 'version' not in data:
-            data['version'] = ''
+        if "present" not in data:
+            data["present"] = "False"
+        if "fault" not in data:
+            data["fault"] = "False"
+        if "version" not in data:
+            data["version"] = ""
 
         self.SetMultiple(INTF_NAME, data)
 
         # this will load properties from cache
         PropertyCacher.load(name, INTF_NAME, self.properties)
 
-    @dbus.service.method(
-        INTF_NAME, in_signature='a{sv}', out_signature='')
+    @dbus.service.method(INTF_NAME, in_signature="a{sv}", out_signature="")
     def update(self, data):
         self.SetMultiple(INTF_NAME, data)
         PropertyCacher.save(self.name, INTF_NAME, self.properties)
 
-    @dbus.service.method(
-        INTF_NAME, in_signature='s', out_signature='')
+    @dbus.service.method(INTF_NAME, in_signature="s", out_signature="")
     def setPresent(self, present):
-        self.Set(INTF_NAME, 'present', present)
+        self.Set(INTF_NAME, "present", present)
         PropertyCacher.save(self.name, INTF_NAME, self.properties)
 
-    @dbus.service.method(
-        INTF_NAME, in_signature='s', out_signature='')
+    @dbus.service.method(INTF_NAME, in_signature="s", out_signature="")
     def setFault(self, fault):
-        self.Set(INTF_NAME, 'fault', fault)
+        self.Set(INTF_NAME, "fault", fault)
         PropertyCacher.save(self.name, INTF_NAME, self.properties)
 
 
 def getVersion():
     version = "Error"
-    with open('/etc/os-release', 'r') as f:
+    with open("/etc/os-release", "r") as f:
         for line in f:
-            p = line.rstrip('\n')
-            parts = line.rstrip('\n').split('=')
-            if (parts[0] == "VERSION_ID"):
+            p = line.rstrip("\n")
+            parts = line.rstrip("\n").split("=")
+            if parts[0] == "VERSION_ID":
                 version = parts[1]
                 version = version.strip('"')
     return version
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
     bus = get_dbus()
     mainloop = gobject.MainLoop()
-    obj_parent = Inventory(bus, '/org/openbmc/inventory')
-    INVENTORY_FILE = os.path.join(sys.prefix, 'share',
-                                  'inventory', 'inventory.json')
+    obj_parent = Inventory(bus, "/org/openbmc/inventory")
+    INVENTORY_FILE = os.path.join(
+        sys.prefix, "share", "inventory", "inventory.json"
+    )
 
     if os.path.exists(INVENTORY_FILE):
         import json
-        with open(INVENTORY_FILE, 'r') as f:
+
+        with open(INVENTORY_FILE, "r") as f:
             try:
                 inv = json.load(f)
             except ValueError:
@@ -98,21 +94,23 @@
     else:
         try:
             import obmc_system_config as System
+
             FRUS = System.FRU_INSTANCES
         except ImportError:
             pass
 
     for f in list(FRUS.keys()):
         import obmc.inventory
+
         obj_path = f.replace("<inventory_root>", obmc.inventory.INVENTORY_ROOT)
         obj = InventoryItem(bus, obj_path, FRUS[f])
         obj_parent.add(obj_path, obj)
 
         # TODO:  this is a hack to update bmc inventory item with version
         # should be done by flash object
-        if (FRUS[f]['fru_type'] == "BMC"):
+        if FRUS[f]["fru_type"] == "BMC":
             version = getVersion()
-            obj.update({'version': version})
+            obj.update({"version": version})
 
     obj_parent.unmask_signals()
     name = dbus.service.BusName(DBUS_NAME, bus)