diff --git a/glances/core/glances_client.py b/glances/core/glances_client.py
index e207dc5d..5e3f2c71 100644
--- a/glances/core/glances_client.py
+++ b/glances/core/glances_client.py
@@ -32,10 +32,10 @@ except ImportError:  # Python 2
 # Import Glances libs
 from glances.core.glances_globals import version
 from glances.core.glances_stats import GlancesStatsClient
-from glances.outputs.glances_curses import glancesCurses
+from glances.outputs.glances_curses import GlancesCurses
 
 
-class GlancesClient():
+class GlancesClient(object):
     """
     This class creates and manages the TCP client
     """
@@ -126,7 +126,7 @@ class GlancesClient():
             self.stats.load_limits(self.config)
 
             # Init screen
-            self.screen = glancesCurses(args=self.args)
+            self.screen = GlancesCurses(args=self.args)
 
         # Return result
         return ret
@@ -201,4 +201,3 @@ class GlancesClient():
         End of the client session
         """
         self.screen.end()
-
diff --git a/glances/core/glances_globals.py b/glances/core/glances_globals.py
index 7de11090..5b46cee4 100644
--- a/glances/core/glances_globals.py
+++ b/glances/core/glances_globals.py
@@ -60,9 +60,9 @@ else:
 # ============================================
 
 # glances_processes for processcount and processlist plugins
-from glances.core.glances_processes import glancesProcesses
-glances_processes = glancesProcesses()
+from glances.core.glances_processes import GlancesProcesses
+glances_processes = GlancesProcesses()
 
 # The global instance for the logs
-from glances.core.glances_logs import glancesLogs
-glances_logs = glancesLogs()
+from glances.core.glances_logs import GlancesLogs
+glances_logs = GlancesLogs()
diff --git a/glances/core/glances_logs.py b/glances/core/glances_logs.py
index 37e3143e..99f97cc0 100644
--- a/glances/core/glances_logs.py
+++ b/glances/core/glances_logs.py
@@ -25,7 +25,7 @@ from datetime import datetime
 from glances.core.glances_globals import glances_processes
 
 
-class glancesLogs:
+class GlancesLogs(object):
     """
     Manage logs inside the Glances software
     Logs is a list of list (stored in the self.logs_list var)
diff --git a/glances/core/glances_main.py b/glances/core/glances_main.py
index d3d2692b..50c49482 100644
--- a/glances/core/glances_main.py
+++ b/glances/core/glances_main.py
@@ -175,9 +175,9 @@ class GlancesMain(object):
         """
         Hash a plain password and return the hashed one
         """
-        from glances.core.glances_password import glancesPassword
+        from glances.core.glances_password import GlancesPassword
 
-        password = glancesPassword()
+        password = GlancesPassword()
 
         return password.hash_password(plain_password)
 
@@ -187,9 +187,9 @@ class GlancesMain(object):
         - with confirmation if confirm = True
         - plain (clear password) if clear = True
         """
-        from glances.core.glances_password import glancesPassword
+        from glances.core.glances_password import GlancesPassword
 
-        password = glancesPassword()
+        password = GlancesPassword()
 
         return password.get_password(description, confirm, clear)
 
diff --git a/glances/core/glances_monitor_list.py b/glances/core/glances_monitor_list.py
index 4de6fcf0..33ce74c2 100644
--- a/glances/core/glances_monitor_list.py
+++ b/glances/core/glances_monitor_list.py
@@ -25,7 +25,7 @@ import subprocess
 from glances.core.glances_globals import glances_processes
 
 
-class monitorList:
+class MonitorList(object):
     """
     This class describes the optionnal monitored processes list
     A list of 'important' processes to monitor.
@@ -52,11 +52,11 @@ class monitorList:
 
         if self.config is not None and self.config.has_section('monitor'):
             # Process monitoring list
-            self.__setMonitorList('monitor', 'list')
+            self.__set_monitor_list('monitor', 'list')
         else:
             self.__monitor_list = []
 
-    def __setMonitorList(self, section, key):
+    def __set_monitor_list(self, section, key):
         """
         Init the monitored processes list
         The list is defined in the Glances configuration file
diff --git a/glances/core/glances_password.py b/glances/core/glances_password.py
index 04bd7385..96b1bd6b 100644
--- a/glances/core/glances_password.py
+++ b/glances/core/glances_password.py
@@ -40,7 +40,7 @@ except NameError:
     pass
 
 
-class glancesPassword:
+class GlancesPassword(object):
     """
     Manage password
     """
diff --git a/glances/core/glances_processes.py b/glances/core/glances_processes.py
index 48640b56..a36044d9 100644
--- a/glances/core/glances_processes.py
+++ b/glances/core/glances_processes.py
@@ -17,14 +17,13 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-import psutil
-
-# Import Glances lib
 from glances.core.glances_globals import is_bsd, is_mac, is_windows
 from glances.core.glances_timer import Timer, getTimeSinceLastUpdate
 
+import psutil
 
-class glancesProcesses:
+
+class GlancesProcesses(object):
     """
     Get processed stats using the PsUtil lib
     """
diff --git a/glances/core/glances_server.py b/glances/core/glances_server.py
index 0325894a..56244e00 100644
--- a/glances/core/glances_server.py
+++ b/glances/core/glances_server.py
@@ -65,22 +65,22 @@ class GlancesXMLRPCHandler(SimpleXMLRPCRequestHandler):
             assert basic == 'Basic', 'Only basic authentication supported'
             #    Encoded portion of the header is a string
             #    Need to convert to bytestring
-            encodedByteString = encoded.encode()
+            encoded_byte_string = encoded.encode()
             #    Decode Base64 byte String to a decoded Byte String
-            decodedBytes = b64decode(encodedByteString)
+            decoded_bytes = b64decode(encoded_byte_string)
             #    Convert from byte string to a regular String
-            decodedString = decodedBytes.decode()
+            decoded_string = decoded_bytes.decode()
             #    Get the username and password from the string
-            (username, _, password) = decodedString.partition(':')
+            (username, _, password) = decoded_string.partition(':')
             #    Check that username and password match internal global dictionary
             return self.check_user(username, password)
 
     def check_user(self, username, password):
         # Check username and password in the dictionnary
         if username in self.server.user_dict:
-            from glances.core.glances_password import glancesPassword
+            from glances.core.glances_password import GlancesPassword
 
-            pwd = glancesPassword()
+            pwd = GlancesPassword()
 
             return pwd.check_password(self.server.user_dict[username], password)
         else:
@@ -119,7 +119,7 @@ class GlancesXMLRPCServer(SimpleXMLRPCServer):
                                     requestHandler)
 
 
-class GlancesInstance():
+class GlancesInstance(object):
     """
     All the methods of this class are published as XML RPC methods
     """
@@ -189,7 +189,7 @@ class GlancesInstance():
             raise AttributeError(item)
 
 
-class GlancesServer():
+class GlancesServer(object):
     """
     This class creates and manages the TCP server
     """
diff --git a/glances/core/glances_standalone.py b/glances/core/glances_standalone.py
index 2c89d537..c6edf589 100644
--- a/glances/core/glances_standalone.py
+++ b/glances/core/glances_standalone.py
@@ -19,10 +19,10 @@
 
 # Import Glances libs
 from glances.core.glances_stats import GlancesStats
-from glances.outputs.glances_curses import glancesCurses
+from glances.outputs.glances_curses import GlancesCurses
 
 
-class GlancesStandalone():
+class GlancesStandalone(object):
     """
     This class creates and manages the Glances standalone session
     """
@@ -37,15 +37,15 @@ class GlancesStandalone():
 
         # Init CSV output
         if args.output_csv is not None:
-            from glances.outputs.glances_csv import glancesCSV
+            from glances.outputs.glances_csv import GlancesCSV
 
-            self.csvoutput = glancesCSV(args=args)
+            self.csvoutput = GlancesCSV(args=args)
             self.csv_tag = True
         else:
             self.csv_tag = False
 
         # Init screen
-        self.screen = glancesCurses(args=args)
+        self.screen = GlancesCurses(args=args)
 
     def serve_forever(self):
         """
diff --git a/glances/core/glances_timer.py b/glances/core/glances_timer.py
index ce9ce4ef..7c5710ab 100644
--- a/glances/core/glances_timer.py
+++ b/glances/core/glances_timer.py
@@ -36,7 +36,7 @@ def getTimeSinceLastUpdate(IOType):
     return time_since_update
 
 
-class Timer:
+class Timer(object):
     """
     The timer class
     A simple chrono
@@ -57,4 +57,3 @@ class Timer:
 
     def finished(self):
         return time() > self.target
-
diff --git a/glances/core/glances_webserver.py b/glances/core/glances_webserver.py
index 6c134feb..c8249710 100644
--- a/glances/core/glances_webserver.py
+++ b/glances/core/glances_webserver.py
@@ -22,10 +22,10 @@ Glances Web Interface (Bottle based)
 
 # Import Glances libs
 from glances.core.glances_stats import GlancesStats
-from glances.outputs.glances_bottle import glancesBottle
+from glances.outputs.glances_bottle import GlancesBottle
 
 
-class GlancesWebServer():
+class GlancesWebServer(object):
     """
     This class creates and manages the Glances Web Server session
     """
@@ -39,7 +39,7 @@ class GlancesWebServer():
         self.stats.update()
 
         # Init the Bottle Web server
-        self.web = glancesBottle(args=args)
+        self.web = GlancesBottle(args=args)
 
     def serve_forever(self):
         """
diff --git a/glances/outputs/glances_bottle.py b/glances/outputs/glances_bottle.py
index fe5ea208..08673a73 100644
--- a/glances/outputs/glances_bottle.py
+++ b/glances/outputs/glances_bottle.py
@@ -27,7 +27,7 @@ except ImportError:
     sys.exit(1)
 
 
-class glancesBottle:
+class GlancesBottle(object):
     """
     This class manage the Bottle Web Server
     """
@@ -186,7 +186,7 @@ class glancesBottle:
                 if m['msg'].split(' ', 1)[0] != '':
                     tpl += '<span class="cell" id="%s">&nbsp;%s</span>' % \
                         (self.__style_list[m['decoration']],
-                        m['msg'].split(' ', 1)[0].replace(' ', '&nbsp;')[:20])
+                         m['msg'].split(' ', 1)[0].replace(' ', '&nbsp;')[:20])
             elif m['optional']:
                 # Manage optional stats (responsive design)
                 tpl += '<span class="cell hide" id="%s">%s</span>' % \
diff --git a/glances/outputs/glances_colorconsole.py b/glances/outputs/glances_colorconsole.py
index 20d9b1ae..f61f66a2 100644
--- a/glances/outputs/glances_colorconsole.py
+++ b/glances/outputs/glances_colorconsole.py
@@ -59,7 +59,7 @@ class ListenGetch(threading.Thread):
             return default
 
 
-class Screen():
+class Screen(object):
 
     COLOR_DEFAULT_WIN = '0F'  # 07'#'0F'
     COLOR_BK_DEFAULT = colorconsole.terminal.colors["BLACK"]
@@ -116,7 +116,7 @@ class Screen():
         return None
 
 
-class WCurseLight():
+class WCurseLight(object):
 
     COLOR_WHITE = colorconsole.terminal.colors["WHITE"]
     COLOR_RED = colorconsole.terminal.colors["RED"]
diff --git a/glances/outputs/glances_csv.py b/glances/outputs/glances_csv.py
index ae17e267..4c129344 100644
--- a/glances/outputs/glances_csv.py
+++ b/glances/outputs/glances_csv.py
@@ -28,7 +28,7 @@ from glances.core.glances_globals import is_py3
 csv_stats_list = ['cpu', 'load', 'mem', 'memswap']
 
 
-class glancesCSV:
+class GlancesCSV(object):
     """
     This class manages the CSV output
     """
diff --git a/glances/outputs/glances_curses.py b/glances/outputs/glances_curses.py
index a07f32b3..147433d0 100644
--- a/glances/outputs/glances_curses.py
+++ b/glances/outputs/glances_curses.py
@@ -37,7 +37,7 @@ else:
     curses = WCurseLight()
 
 
-class glancesCurses:
+class GlancesCurses(object):
     """
     This class manage the curses display (and key pressed)
     """
@@ -160,7 +160,7 @@ class glancesCurses:
         self.term_window.nodelay(1)
         self.pressedkey = -1
 
-    def __getkey(self, window):
+    def __get_key(self, window):
         """
         A getKey function to catch ESC key AND Numlock key (issue #163)
         """
@@ -174,10 +174,10 @@ class glancesCurses:
         else:
             return keycode[0]
 
-    def __catchKey(self):
+    def __catch_key(self):
         # Get key
-        #~ self.pressedkey = self.term_window.getch()
-        self.pressedkey = self.__getkey(self.term_window)
+        # ~ self.pressedkey = self.term_window.getch()
+        self.pressedkey = self.__get_key(self.term_window)
 
         # Actions...
         if self.pressedkey == ord('\x1b') or self.pressedkey == ord('q'):
@@ -456,7 +456,7 @@ class glancesCurses:
         countdown = Timer(self.__refresh_time)
         while (not countdown.finished()):
             # Getkey
-            if self.__catchKey() > -1:
+            if self.__catch_key() > -1:
                 # flush display
                 self.flush(stats, cs_status=cs_status)
             # Wait 100ms...
diff --git a/glances/plugins/glances_batpercent.py b/glances/plugins/glances_batpercent.py
index c961aa07..335e4dd8 100644
--- a/glances/plugins/glances_batpercent.py
+++ b/glances/plugins/glances_batpercent.py
@@ -41,7 +41,7 @@ class Plugin(GlancesPlugin):
         GlancesPlugin.__init__(self, args=args)
 
         # Init the sensor class
-        self.glancesgrabbat = glancesGrabBat()
+        self.glancesgrabbat = GlancesGrabBat()
 
         # We do not want to display the stat in a dedicated area
         # The HDD temp is displayed within the sensors plugin
@@ -78,7 +78,7 @@ class Plugin(GlancesPlugin):
         return self.stats
 
 
-class glancesGrabBat:
+class GlancesGrabBat(object):
     """
     Get batteries stats using the Batinfo library
     """
diff --git a/glances/plugins/glances_core.py b/glances/plugins/glances_core.py
index dd147eab..d060b2b4 100644
--- a/glances/plugins/glances_core.py
+++ b/glances/plugins/glances_core.py
@@ -17,10 +17,10 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-import psutil
-
 from glances.plugins.glances_plugin import GlancesPlugin
 
+import psutil
+
 
 class Plugin(GlancesPlugin):
     """
diff --git a/glances/plugins/glances_cpu.py b/glances/plugins/glances_cpu.py
index dbf541b6..2d229c84 100644
--- a/glances/plugins/glances_cpu.py
+++ b/glances/plugins/glances_cpu.py
@@ -20,10 +20,10 @@
 Glances CPU plugin
 """
 
-import psutil
-
 from glances.plugins.glances_plugin import GlancesPlugin
 
+import psutil
+
 # SNMP OID
 # percentage of user CPU time: .1.3.6.1.4.1.2021.11.9.0
 # percentages of system CPU time: .1.3.6.1.4.1.2021.11.10.0
diff --git a/glances/plugins/glances_diskio.py b/glances/plugins/glances_diskio.py
index f0c572f6..87f4041f 100644
--- a/glances/plugins/glances_diskio.py
+++ b/glances/plugins/glances_diskio.py
@@ -20,12 +20,12 @@
 Glances DiskIO plugin
 """
 
-import psutil
-
 # Import Glances libs
 from glances.core.glances_timer import getTimeSinceLastUpdate
 from glances.plugins.glances_plugin import GlancesPlugin
 
+import psutil
+
 
 class Plugin(GlancesPlugin):
     """
diff --git a/glances/plugins/glances_fs.py b/glances/plugins/glances_fs.py
index db41cbcd..e3c2b1e2 100644
--- a/glances/plugins/glances_fs.py
+++ b/glances/plugins/glances_fs.py
@@ -17,10 +17,10 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-import psutil
-
 from glances.plugins.glances_plugin import GlancesPlugin
 
+import psutil
+
 # SNMP OID
 # The snmpd.conf needs to be edited.
 # Add the following to enable it on all disk
diff --git a/glances/plugins/glances_hddtemp.py b/glances/plugins/glances_hddtemp.py
index 89423b29..3deeb85a 100644
--- a/glances/plugins/glances_hddtemp.py
+++ b/glances/plugins/glances_hddtemp.py
@@ -35,7 +35,7 @@ class Plugin(GlancesPlugin):
         GlancesPlugin.__init__(self, args=args)
 
         # Init the sensor class
-        self.glancesgrabhddtemp = glancesGrabHDDTemp()
+        self.glancesgrabhddtemp = GlancesGrabHDDTemp()
 
         # We do not want to display the stat in a dedicated area
         # The HDD temp is displayed within the sensors plugin
@@ -70,7 +70,7 @@ class Plugin(GlancesPlugin):
         return self.stats
 
 
-class glancesGrabHDDTemp:
+class GlancesGrabHDDTemp(object):
     """
     Get hddtemp stats using a socket connection
     """
diff --git a/glances/plugins/glances_mem.py b/glances/plugins/glances_mem.py
index b11bdb3a..d102854a 100644
--- a/glances/plugins/glances_mem.py
+++ b/glances/plugins/glances_mem.py
@@ -20,10 +20,10 @@
 Glances virtual memory plugin
 """
 
-import psutil
-
 from glances.plugins.glances_plugin import GlancesPlugin
 
+import psutil
+
 # SNMP OID
 # Total RAM in machine: .1.3.6.1.4.1.2021.4.5.0
 # Total RAM used: .1.3.6.1.4.1.2021.4.6.0
diff --git a/glances/plugins/glances_memswap.py b/glances/plugins/glances_memswap.py
index 57307ec2..98591350 100644
--- a/glances/plugins/glances_memswap.py
+++ b/glances/plugins/glances_memswap.py
@@ -20,10 +20,10 @@
 Glances swap memory plugin
 """
 
-import psutil
-
 from glances.plugins.glances_plugin import GlancesPlugin
 
+import psutil
+
 # SNMP OID
 # Total Swap Size: .1.3.6.1.4.1.2021.4.3.0
 # Available Swap Space: .1.3.6.1.4.1.2021.4.4.0
diff --git a/glances/plugins/glances_monitor.py b/glances/plugins/glances_monitor.py
index 3cefe211..a1d16b3b 100644
--- a/glances/plugins/glances_monitor.py
+++ b/glances/plugins/glances_monitor.py
@@ -18,7 +18,7 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 # Import Glances lib
-from glances.core.glances_monitor_list import monitorList as glancesMonitorList
+from glances.core.glances_monitor_list import MonitorList as glancesMonitorList
 from glances.plugins.glances_plugin import GlancesPlugin
 
 
diff --git a/glances/plugins/glances_network.py b/glances/plugins/glances_network.py
index d9bd26df..68176c55 100644
--- a/glances/plugins/glances_network.py
+++ b/glances/plugins/glances_network.py
@@ -20,13 +20,11 @@
 Glances Network interface plugin
 """
 
-# Import system libs
-import psutil
-
-# Import Glances lib
 from glances.core.glances_timer import getTimeSinceLastUpdate
 from glances.plugins.glances_plugin import GlancesPlugin
 
+import psutil
+
 # SNMP OID
 # http://www.net-snmp.org/docs/mibs/interfaces.html
 # Dict key = interface_name
@@ -169,7 +167,7 @@ class Plugin(GlancesPlugin):
         Return the dict to displayoid in the curse interface
         """
 
-        #!!! TODO: Add alert on network interface bitrate
+        # !!! TODO: Add alert on network interface bitrate
 
         # Init the return message
         ret = []
diff --git a/glances/plugins/glances_percpu.py b/glances/plugins/glances_percpu.py
index 0bdf04c6..88942541 100644
--- a/glances/plugins/glances_percpu.py
+++ b/glances/plugins/glances_percpu.py
@@ -20,12 +20,12 @@
 CPU stats (per cpu)
 """
 
-# Check for psutil already done in the glances_core script
-import psutil
-
 # Import Glances libs
 from glances.plugins.glances_plugin import GlancesPlugin
 
+# Check for psutil already done in the glances_core script
+import psutil
+
 
 class Plugin(GlancesPlugin):
     """
diff --git a/glances/plugins/glances_plugin.py b/glances/plugins/glances_plugin.py
index 95408ba9..e157c514 100644
--- a/glances/plugins/glances_plugin.py
+++ b/glances/plugins/glances_plugin.py
@@ -256,7 +256,7 @@ class GlancesPlugin(object):
     def get_stats_display(self, args=None):
         # Return a dict with all the information needed to display the stat
         # key     | description
-        #----------------------------
+        # ----------------------------
         # display | Display the stat (True or False)
         # msgdict | Message to display (list of dict [{ 'msg': msg, 'decoration': decoration } ... ])
         # column  | column number
diff --git a/glances/plugins/glances_psutilversion.py b/glances/plugins/glances_psutilversion.py
index 1999f9f3..21199913 100644
--- a/glances/plugins/glances_psutilversion.py
+++ b/glances/plugins/glances_psutilversion.py
@@ -17,10 +17,10 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from psutil import __version__ as __psutil_version
-
 from glances.plugins.glances_plugin import GlancesPlugin
 
+from psutil import __version__ as __psutil_version
+
 
 class Plugin(GlancesPlugin):
     """
diff --git a/glances/plugins/glances_sensors.py b/glances/plugins/glances_sensors.py
index 9b18e8c6..8e7070fc 100644
--- a/glances/plugins/glances_sensors.py
+++ b/glances/plugins/glances_sensors.py
@@ -44,7 +44,7 @@ class Plugin(GlancesPlugin):
         GlancesPlugin.__init__(self, args=args)
 
         # Init the sensor class
-        self.glancesgrabsensors = glancesGrabSensors()
+        self.glancesgrabsensors = GlancesGrabSensors()
 
         # Instance for the HDDTemp Plugin in order to display the hard disks temperatures
         self.hddtemp_plugin = HddTempPlugin()
@@ -143,7 +143,7 @@ class Plugin(GlancesPlugin):
         return ret
 
 
-class glancesGrabSensors:
+class GlancesGrabSensors(object):
     """
     Get sensors stats using the PySensors library
     """
diff --git a/glances/plugins/glances_system.py b/glances/plugins/glances_system.py
index 922b43ae..29fdaeab 100644
--- a/glances/plugins/glances_system.py
+++ b/glances/plugins/glances_system.py
@@ -31,6 +31,7 @@ from glances.plugins.glances_plugin import GlancesPlugin
 snmp_oid = {'hostname': '1.3.6.1.2.1.1.5.0',
             'os_name': '1.3.6.1.2.1.1.1.0'}
 
+
 class Plugin(GlancesPlugin):
     """
     Glances' Host/System Plugin
diff --git a/glances/plugins/glances_uptime.py b/glances/plugins/glances_uptime.py
index e482d230..900fe1c2 100644
--- a/glances/plugins/glances_uptime.py
+++ b/glances/plugins/glances_uptime.py
@@ -20,15 +20,16 @@
 # Import system libs
 from datetime import datetime, timedelta
 
-# Check for psutil already done in the glances_core script
-import psutil
-
 # Import Glances libs
 from glances.plugins.glances_plugin import GlancesPlugin
 
+# Check for psutil already done in the glances_core script
+import psutil
+
 # SNMP OID
 snmp_oid = {'_uptime': '1.3.6.1.2.1.1.3.0'}
 
+
 class Plugin(GlancesPlugin):
     """
     Glances' Uptime Plugin