diff --git a/app/scodoc/TrivialFormulator.py b/app/scodoc/TrivialFormulator.py
index c0b1e4736a..b86b1ae41a 100644
--- a/app/scodoc/TrivialFormulator.py
+++ b/app/scodoc/TrivialFormulator.py
@@ -113,7 +113,7 @@ def TrivialFormulator(
     return res, form, t.result
 
 
-class TF:
+class TF(object):
     def __init__(
         self,
         form_url,
diff --git a/app/scodoc/debug.py b/app/scodoc/debug.py
index 456b136325..cd14b33cb6 100644
--- a/app/scodoc/debug.py
+++ b/app/scodoc/debug.py
@@ -92,7 +92,7 @@ def go_dept(app, dept, verbose=True):
     raise ValueError("dep %s not found" % dept)
 
 
-class FakeUser:
+class FakeUser(object):
     def __init__(self, name):
         self.name = name
 
@@ -106,7 +106,7 @@ class FakeUser:
         return True
 
 
-class DummyResponse:
+class DummyResponse(object):
     """Emulation vide de Reponse http Zope"""
 
     def __init__(self):
@@ -120,7 +120,7 @@ class DummyResponse:
         self.redirected = url
 
 
-class DummyRequest:
+class DummyRequest(object):
     """Emulation vide de Request Zope"""
 
     def __init__(self):
diff --git a/app/scodoc/gen_tables.py b/app/scodoc/gen_tables.py
index 7f15dc8248..1931bad7c4 100644
--- a/app/scodoc/gen_tables.py
+++ b/app/scodoc/gen_tables.py
@@ -72,7 +72,7 @@ def mark_paras(L, tags):
     return L
 
 
-class DEFAULT_TABLE_PREFERENCES:
+class DEFAULT_TABLE_PREFERENCES(object):
     """Default preferences for tables created without preferences argument"""
 
     values = {
@@ -85,7 +85,7 @@ class DEFAULT_TABLE_PREFERENCES:
         return self.values[k]
 
 
-class GenTable:
+class GenTable(object):
     """Simple 2D tables with export to HTML, PDF, Excel, CSV.
     Can be sub-classed to generate fancy formats.
     """
@@ -679,7 +679,7 @@ class GenTable:
 
 
 # -----
-class SeqGenTable:
+class SeqGenTable(object):
     """Sequence de GenTable: permet de générer un classeur excel avec un tab par table.
     L'ordre des tabs est conservé (1er tab == 1ere table ajoutée)
     """
diff --git a/app/scodoc/notes_log.py b/app/scodoc/notes_log.py
index 471122695f..f28114915f 100644
--- a/app/scodoc/notes_log.py
+++ b/app/scodoc/notes_log.py
@@ -20,7 +20,7 @@ DEFAULT_LOG_DIR = "/tmp"  # clients should call set_log_directory to change this
 ALARM_DESTINATION = "emmanuel.viennet@univ-paris13.fr"  # XXX a mettre en preference
 
 
-class _logguer:
+class _logguer(object):
     def __init__(self):
         self.file = None
         self.directory = None
diff --git a/app/scodoc/notes_table.py b/app/scodoc/notes_table.py
index 3ab5aa606e..270dc5bbf8 100644
--- a/app/scodoc/notes_table.py
+++ b/app/scodoc/notes_table.py
@@ -153,7 +153,7 @@ def comp_etud_sum_coef_modules_ue(context, formsemestre_id, etudid, ue_id):
         return s
 
 
-class NotesTable:
+class NotesTable(object):
     """Une NotesTable représente un tableau de notes pour un semestre de formation.
     Les colonnes sont des modules.
     Les lignes des étudiants.
diff --git a/app/scodoc/notesdb.py b/app/scodoc/notesdb.py
index 3df2fd466d..da1e527500 100644
--- a/app/scodoc/notesdb.py
+++ b/app/scodoc/notesdb.py
@@ -253,7 +253,7 @@ def DBDelete(cnx, table, colid, val, commit=False):
 # REQN = 0
 
 
-class EditableTable:
+class EditableTable(object):
     """--- generic class: SQL table with create/edit/list/delete"""
 
     def __init__(
diff --git a/app/scodoc/pe_jurype.py b/app/scodoc/pe_jurype.py
index 55bf2601fc..74c8f3b4fa 100644
--- a/app/scodoc/pe_jurype.py
+++ b/app/scodoc/pe_jurype.py
@@ -85,7 +85,7 @@ def comp_nom_semestre_dans_parcours(context, sem):
 
 
 # ----------------------------------------------------------------------------------------
-class JuryPE:
+class JuryPE(object):
     """Classe memorisant toutes les informations necessaires pour etablir un jury de PE. Modele
     base sur NotesTable
 
diff --git a/app/scodoc/pe_tagtable.py b/app/scodoc/pe_tagtable.py
index e8df575a9f..850832b99f 100644
--- a/app/scodoc/pe_tagtable.py
+++ b/app/scodoc/pe_tagtable.py
@@ -42,7 +42,7 @@ import datetime
 from app.scodoc import notes_table
 
 
-class TableTag:
+class TableTag(object):
     """
     Classe mémorisant les moyennes des étudiants à différents tag et permettant de calculer les rangs et les statistiques :
     - nom : Nom représentatif des données de la Table
diff --git a/app/scodoc/sco_abs.py b/app/scodoc/sco_abs.py
index 7c8b42e70e..beba415549 100644
--- a/app/scodoc/sco_abs.py
+++ b/app/scodoc/sco_abs.py
@@ -84,7 +84,7 @@ def MonthNbDays(month, year):
         return 30
 
 
-class ddmmyyyy:
+class ddmmyyyy(object):
     """immutable dates"""
 
     def __init__(self, date=None, fmt="ddmmyyyy", work_saturday=False):
@@ -987,7 +987,7 @@ def MonthTableBody(
 #  absences à une date donnée).
 #
 # --------------------------------------------------------------------
-class CAbsSemEtud:
+class CAbsSemEtud(object):
     """Comptes d'absences d'un etudiant dans un semestre"""
 
     def __init__(self, context, sem, etudid):
diff --git a/app/scodoc/sco_apogee_csv.py b/app/scodoc/sco_apogee_csv.py
index 540da23cef..974ce478e3 100644
--- a/app/scodoc/sco_apogee_csv.py
+++ b/app/scodoc/sco_apogee_csv.py
@@ -220,7 +220,7 @@ class DictCol(dict):
     pass
 
 
-class ApoElt:
+class ApoElt(object):
     """Definition d'un Element Apogee
     sur plusieurs colonnes du fichier CSV
     """
@@ -248,7 +248,7 @@ class ApoElt:
         return "ApoElt(code='%s', cols=%s)" % (self.code, pprint.pformat(self.cols))
 
 
-class EtuCol:
+class EtuCol(object):
     """Valeurs colonnes d'un element pour un etudiant"""
 
     def __init__(self, nip, apo_elt, init_vals):
@@ -669,7 +669,7 @@ class ApoEtud(dict):
         return cur_sem, autre_sem
 
 
-class ApoData:
+class ApoData(object):
     def __init__(
         self,
         data,
diff --git a/app/scodoc/sco_archives.py b/app/scodoc/sco_archives.py
index 2770bcadf1..7891f0199a 100644
--- a/app/scodoc/sco_archives.py
+++ b/app/scodoc/sco_archives.py
@@ -70,7 +70,7 @@ from app.scodoc import sco_pvjury
 from app.scodoc import sco_pvpdf
 
 
-class BaseArchiver:
+class BaseArchiver(object):
     def __init__(self, archive_type=""):
         dirs = [Config.INSTANCE_HOME, "var", "scodoc", "archives"]
         if archive_type:
diff --git a/app/scodoc/sco_bac.py b/app/scodoc/sco_bac.py
index 64eb96e607..1bd08f1e4b 100644
--- a/app/scodoc/sco_bac.py
+++ b/app/scodoc/sco_bac.py
@@ -130,7 +130,7 @@ BACS_SSP = {(t[0], t[1]): t[2:] for t in _BACS}
 BACS_S = {t[0]: t[2:] for t in _BACS}
 
 
-class Baccalaureat:
+class Baccalaureat(object):
     def __init__(self, bac, specialite=""):
         self.bac = bac
         self.specialite = specialite
diff --git a/app/scodoc/sco_bulletins_generator.py b/app/scodoc/sco_bulletins_generator.py
index 8f0d2707ce..6e75391507 100644
--- a/app/scodoc/sco_bulletins_generator.py
+++ b/app/scodoc/sco_bulletins_generator.py
@@ -97,7 +97,7 @@ def bulletin_get_class_name_displayed(context, formsemestre_id):
         return "invalide ! (voir paramètres)"
 
 
-class BulletinGenerator:
+class BulletinGenerator(object):
     "Virtual superclass for PDF bulletin generators" ""
     # Here some helper methods
     # see sco_bulletins_standard.BulletinGeneratorStandard subclass for real methods
diff --git a/app/scodoc/sco_bulletins_legacy.py b/app/scodoc/sco_bulletins_legacy.py
index ccf9a905d2..96dafd2582 100644
--- a/app/scodoc/sco_bulletins_legacy.py
+++ b/app/scodoc/sco_bulletins_legacy.py
@@ -387,7 +387,7 @@ class BulletinGeneratorLegacy(sco_bulletins_generator.BulletinGenerator):
 sco_bulletins_generator.register_bulletin_class(BulletinGeneratorLegacy)
 
 
-class BulTableStyle:
+class BulTableStyle(object):
     """Construction du style de tables reportlab platypus pour les bulletins "classiques" """
 
     LINEWIDTH = 0.5
diff --git a/app/scodoc/sco_cache.py b/app/scodoc/sco_cache.py
index aa114564ca..f81e5327c8 100644
--- a/app/scodoc/sco_cache.py
+++ b/app/scodoc/sco_cache.py
@@ -32,7 +32,7 @@
 import time
 
 # Cache data
-class simpleCache:
+class simpleCache(object):
     def __init__(self):
         self.cache = {}
         self.inval_cache()  # >
diff --git a/app/scodoc/sco_codes_parcours.py b/app/scodoc/sco_codes_parcours.py
index da948d0a81..42010c1910 100644
--- a/app/scodoc/sco_codes_parcours.py
+++ b/app/scodoc/sco_codes_parcours.py
@@ -171,7 +171,7 @@ DEVENIRS_NEXT2 = {NEXT_OR_NEXT2: 1, NEXT2: 1}
 NO_SEMESTRE_ID = -1  # code semestre si pas de semestres
 
 # Regles gestion parcours
-class DUTRule:
+class DUTRule(object):
     def __init__(self, rule_id, premise, conclusion):
         self.rule_id = rule_id
         self.premise = premise
@@ -196,7 +196,7 @@ class DUTRule:
 DEFAULT_TYPE_PARCOURS = 100  # pour le menu de creation nouvelle formation
 
 
-class TypeParcours:
+class TypeParcours(object):
     TYPE_PARCOURS = None  # id, utilisé par notes_formation.type_parcours
     NAME = None  # required
     NB_SEM = 1  # Nombre de semestres
@@ -213,7 +213,9 @@ class TypeParcours:
     UNUSED_CODES = set()  # Ensemble des codes jury non autorisés dans ce parcours
     UE_IS_MODULE = False  # 1 seul module par UE (si plusieurs modules, etudiants censéments inscrits à un seul d'entre eux)
     ECTS_ONLY = False  # Parcours avec progression basée uniquement sur les ECTS
-    ALLOWED_UE_TYPES = list(UE_TYPE_NAME.keys())  # par defaut, autorise tous les types d'UE
+    ALLOWED_UE_TYPES = list(
+        UE_TYPE_NAME.keys()
+    )  # par defaut, autorise tous les types d'UE
 
     def check(self, formation=None):
         return True, ""  # status, diagnostic_message
diff --git a/app/scodoc/sco_core.py b/app/scodoc/sco_core.py
index 97c848a3d8..75f8e19541 100644
--- a/app/scodoc/sco_core.py
+++ b/app/scodoc/sco_core.py
@@ -35,7 +35,7 @@ def get_evaluations_cache(context):
         return CACHE_evaluations[u]
 
 
-class CacheNotesTable:
+class CacheNotesTable(object):
     """gestion rudimentaire de cache pour les NotesTables"""
 
     def __init__(self):
@@ -191,7 +191,12 @@ class CacheNotesTable:
             if r:
                 log(
                     "get_bulletins_pdf(%s): cache hit %s (id=%s, thread=%s)"
-                    % (version, formsemestre_id, id(self), six.moves._thread.get_ident())
+                    % (
+                        version,
+                        formsemestre_id,
+                        id(self),
+                        six.moves._thread.get_ident(),
+                    )
                 )
             return r
         finally:
diff --git a/app/scodoc/sco_etape_bilan.py b/app/scodoc/sco_etape_bilan.py
index df9921e8b4..015b440d6d 100644
--- a/app/scodoc/sco_etape_bilan.py
+++ b/app/scodoc/sco_etape_bilan.py
@@ -125,7 +125,7 @@ FLAG = {
 }
 
 
-class DataEtudiant:
+class DataEtudiant(object):
     """
     Structure de donnée des informations pour un étudiant
     """
@@ -230,7 +230,7 @@ def entete_liste_etudiant():
     """
 
 
-class EtapeBilan:
+class EtapeBilan(object):
     """
     Structure de donnée représentation l'état global de la comparaison ScoDoc/Apogée
     """
diff --git a/app/scodoc/sco_etud.py b/app/scodoc/sco_etud.py
index d42bb61241..7abe00bbe3 100644
--- a/app/scodoc/sco_etud.py
+++ b/app/scodoc/sco_etud.py
@@ -576,7 +576,7 @@ admission_list = _admissionEditor.list
 admission_edit = _admissionEditor.edit
 
 # Edition simultanee de identite et admission
-class EtudIdentEditor:
+class EtudIdentEditor(object):
     def create(self, cnx, args, context=None, REQUEST=None):
         etudid = identite_create(cnx, args, context, REQUEST)
         args["etudid"] = etudid
diff --git a/app/scodoc/sco_excel.py b/app/scodoc/sco_excel.py
index 3556efce9d..1860549598 100644
--- a/app/scodoc/sco_excel.py
+++ b/app/scodoc/sco_excel.py
@@ -179,7 +179,7 @@ def Excel_MakeStyle(
     return style
 
 
-class ScoExcelSheet:
+class ScoExcelSheet(object):
     def __init__(self, sheet_name="feuille", default_style=None):
         self.sheet_name = sheet_name
         self.cells = []  # list of list
diff --git a/app/scodoc/sco_formsemestre.py b/app/scodoc/sco_formsemestre.py
index e112876553..fcfd857f73 100644
--- a/app/scodoc/sco_formsemestre.py
+++ b/app/scodoc/sco_formsemestre.py
@@ -386,7 +386,7 @@ def _write_formsemestre_aux(context, sem, fieldname, valuename):
 
 
 # ------ Utilisé pour stocker le VDI avec le code étape (noms de fichiers maquettes et code semestres)
-class ApoEtapeVDI:
+class ApoEtapeVDI(object):
     _ETAPE_VDI_SEP = "!"
 
     def __init__(self, etape_vdi=None, etape="", vdi=""):
diff --git a/app/scodoc/sco_groups.py b/app/scodoc/sco_groups.py
index 1048c5e1e0..70d505f628 100644
--- a/app/scodoc/sco_groups.py
+++ b/app/scodoc/sco_groups.py
@@ -1517,7 +1517,7 @@ def make_query_groups(group_ids):
         return ""
 
 
-class GroupIdInferer:
+class GroupIdInferer(object):
     """Sert à retrouver l'id d'un groupe dans un semestre donné
     à partir de son nom.
     Attention: il peut y avoir plusieurs groupes de même nom
diff --git a/app/scodoc/sco_groups_view.py b/app/scodoc/sco_groups_view.py
index 2a9430e3b8..4a37cc0edd 100644
--- a/app/scodoc/sco_groups_view.py
+++ b/app/scodoc/sco_groups_view.py
@@ -295,7 +295,7 @@ if (group_id) {
     return "\n".join(H)
 
 
-class DisplayedGroupsInfos:
+class DisplayedGroupsInfos(object):
     """Container with attributes describing groups to display in the page
     .groups_query_args : 'group_ids=xxx&group_ids=yyy'
     .base_url : url de la requete, avec les groupes, sans les autres paramètres
diff --git a/app/scodoc/sco_news.py b/app/scodoc/sco_news.py
index 88c98a95d5..cd462dd363 100644
--- a/app/scodoc/sco_news.py
+++ b/app/scodoc/sco_news.py
@@ -130,7 +130,7 @@ def scolar_news_summary(context, n=5):
 
     news = list(selected_news.values())
     # sort by date, descending
-    news.sort(itemgetter("date"), reverse=True)
+    news.sort(key=itemgetter("date"), reverse=True)
     news = news[:n]
     # mimic EditableTable.list output formatting:
     for n in news:
diff --git a/app/scodoc/sco_parcours_dut.py b/app/scodoc/sco_parcours_dut.py
index ce7a48b17c..2eaf52e0c6 100644
--- a/app/scodoc/sco_parcours_dut.py
+++ b/app/scodoc/sco_parcours_dut.py
@@ -63,7 +63,7 @@ from app.scodoc.dutrules import DUTRules  # regles generees a partir du CSV
 from app.scodoc.sco_exceptions import ScoValueError
 
 
-class DecisionSem:
+class DecisionSem(object):
     "Decision prenable pour un semestre"
 
     def __init__(
@@ -116,7 +116,7 @@ def SituationEtudParcours(context, etud, formsemestre_id):
         return SituationEtudParcoursGeneric(context, etud, formsemestre_id, nt)
 
 
-class SituationEtudParcoursGeneric:
+class SituationEtudParcoursGeneric(object):
     "Semestre dans un parcours"
 
     def __init__(self, context, etud, formsemestre_id, nt):
diff --git a/app/scodoc/sco_pdf.py b/app/scodoc/sco_pdf.py
index 7ebc7d28b9..c415a776e2 100644
--- a/app/scodoc/sco_pdf.py
+++ b/app/scodoc/sco_pdf.py
@@ -334,7 +334,7 @@ def pdf_basic_page(
 import threading, time, six.moves.queue, six.moves._thread
 
 
-class PDFLock:
+class PDFLock(object):
     def __init__(self, timeout=15):
         self.Q = six.moves.queue.Queue(1)
         self.timeout = timeout
diff --git a/app/scodoc/sco_permissions.py b/app/scodoc/sco_permissions.py
index bc8a7864dc..a5419d4e01 100644
--- a/app/scodoc/sco_permissions.py
+++ b/app/scodoc/sco_permissions.py
@@ -40,7 +40,7 @@ _SCO_PERMISSIONS = (
 )
 
 
-class Permission:
+class Permission(object):
     "Permissions for ScoDoc"
     NBITS = 1  # maximum bits used (for formatting)
     ALL_PERMISSIONS = [-1]
diff --git a/app/scodoc/sco_portal_apogee.py b/app/scodoc/sco_portal_apogee.py
index fd8ac01a48..a7a737c0df 100644
--- a/app/scodoc/sco_portal_apogee.py
+++ b/app/scodoc/sco_portal_apogee.py
@@ -50,7 +50,7 @@ def has_portal(context):
     return get_portal_url(context)
 
 
-class PortalInterface:
+class PortalInterface(object):
     def __init__(self):
         self.warning = False
 
@@ -157,10 +157,14 @@ def get_inscrits_etape(context, code_etape, anneeapogee=None, ntrials=2):
         req = (
             etud_url
             + "?"
-            + six.moves.urllib.parse.urlencode((("etape", code_etape), ("annee", anneeapogee)))
+            + six.moves.urllib.parse.urlencode(
+                (("etape", code_etape), ("annee", anneeapogee))
+            )
         )
     else:
-        req = etud_url + "?" + six.moves.urllib.parse.urlencode((("etape", code_etape),))
+        req = (
+            etud_url + "?" + six.moves.urllib.parse.urlencode((("etape", code_etape),))
+        )
     actual_timeout = float(portal_timeout) / ntrials
     if portal_timeout > 0:
         actual_timeout = max(1, actual_timeout)
@@ -565,7 +569,9 @@ def get_maquette_apogee(context, etape="", annee_scolaire=""):
     req = (
         maquette_url
         + "?"
-        + six.moves.urllib.parse.urlencode((("etape", etape), ("annee", annee_scolaire)))
+        + six.moves.urllib.parse.urlencode(
+            (("etape", etape), ("annee", annee_scolaire))
+        )
     )
     doc = scu.query_portal(req, timeout=portal_timeout)
     return doc
diff --git a/app/scodoc/sco_report.py b/app/scodoc/sco_report.py
index 02a97da8c2..023fad4be1 100644
--- a/app/scodoc/sco_report.py
+++ b/app/scodoc/sco_report.py
@@ -479,7 +479,7 @@ def table_suivi_cohorte(
     # 3-- Regroupe les semestres par date de debut
     P = []  #  liste de periodsem
 
-    class periodsem:
+    class periodsem(object):
         pass
 
     # semestre de depart:
diff --git a/app/scodoc/sco_tag_module.py b/app/scodoc/sco_tag_module.py
index 63321e0a69..20be758c55 100644
--- a/app/scodoc/sco_tag_module.py
+++ b/app/scodoc/sco_tag_module.py
@@ -59,7 +59,7 @@ from app.scodoc.sco_permissions import Permission
 #   module_tag_set( module_id, taglist ) -> modifie les tags
 
 
-class ScoTag:
+class ScoTag(object):
     """Generic tags for ScoDoc"""
 
     # must be overloaded:
diff --git a/app/scodoc/sco_utils.py b/app/scodoc/sco_utils.py
index 5f07272568..bac16cdf25 100644
--- a/app/scodoc/sco_utils.py
+++ b/app/scodoc/sco_utils.py
@@ -204,7 +204,7 @@ class DictDefault(dict):  # obsolete, use collections.defaultdict
         return value
 
 
-class WrapDict:
+class WrapDict(object):
     """Wrap a dict so that getitem returns '' when values are None"""
 
     def __init__(self, adict, NoneValue=""):
diff --git a/config/scodoc_config.py b/config/scodoc_config.py
index 4361854548..098b85c381 100644
--- a/config/scodoc_config.py
+++ b/config/scodoc_config.py
@@ -15,7 +15,7 @@
 # souvent de comprendre le code qui les utilise pour ne pas faire d'erreur: attention.
 
 
-class CFG:
+class CFG(object):
     pass
 
 
diff --git a/config/scodoc_config_tmpl.py b/config/scodoc_config_tmpl.py
index 55cab115d2..00e5fc7358 100644
--- a/config/scodoc_config_tmpl.py
+++ b/config/scodoc_config_tmpl.py
@@ -16,7 +16,7 @@
 # souvent de comprendre le code qui les utilise pour ne pas faire d'erreur: attention.
 
 
-class CFG:
+class CFG(object):
     pass
 
 
diff --git a/scodoc_manager.py b/scodoc_manager.py
index 3bf8d4da00..6c301b547d 100644
--- a/scodoc_manager.py
+++ b/scodoc_manager.py
@@ -23,7 +23,12 @@ from config import Config
 from app.scodoc.sco_exceptions import ScoConfigurationError
 
 
-class ScoDeptDescription:
+class ScoDeptDescription(object):
+    """Description d'un département
+    .dept_id : eg "RT"
+    .db_uri : dept database URI
+    """
+
     def __init__(self, filename):
         """Read dept description from dept file"""
         if os.path.split(filename)[1][-4:] != ".cfg":
diff --git a/scotests/sco_fake_gen.py b/scotests/sco_fake_gen.py
index e312d31070..b1bf273f89 100644
--- a/scotests/sco_fake_gen.py
+++ b/scotests/sco_fake_gen.py
@@ -63,7 +63,7 @@ def logging_meth(func):
     return wrapper_logging_meth
 
 
-class ScoFake:
+class ScoFake(object):
     def __init__(self, context, verbose=True):
         self.context = context
         self.verbose = verbose