diff --git a/app/views/entreprises.py b/app/views/entreprises.py
old mode 100755
new mode 100644
diff --git a/app/views/essais.py b/app/views/essais.py
index 1a49cadc..8e056df0 100644
--- a/app/views/essais.py
+++ b/app/views/essais.py
@@ -5,6 +5,7 @@ Module Essais: divers essais pour la migration vers Flask
 Emmanuel Viennet, 2021
 """
 
+from __future__ import absolute_import
 from flask import g
 from flask import current_app
 
diff --git a/app/views/notes.py b/app/views/notes.py
index f5e95d35..5d1ccc60 100644
--- a/app/views/notes.py
+++ b/app/views/notes.py
@@ -30,6 +30,7 @@ Module notes: issu de ScoDoc7 / ZNotes.py
 
 Emmanuel Viennet, 2021
 """
+from __future__ import absolute_import
 import sys
 import time
 import datetime
@@ -722,7 +723,7 @@ def edit_enseignants_form(context, REQUEST, moduleimpl_id):
     login2display = {}  # user_name : forme pour affichage = "NOM Prenom (login)"
     for u in userlist:
         login2display[u["user_name"]] = u["nomplogin"]
-        allowed_user_names = login2display.values()
+        allowed_user_names = list(login2display.values())
 
     H = [
         "<ul><li><b>%s</b> (responsable)</li>"
@@ -836,7 +837,7 @@ def edit_moduleimpl_resp(context, REQUEST, moduleimpl_id):
     login2display = {}  # user_name : forme pour affichage = "NOM Prenom (login)"
     for u in userlist:
         login2display[u["user_name"]] = u["nomplogin"]
-    allowed_user_names = login2display.values()
+    allowed_user_names = list(login2display.values())
 
     initvalues = M
     initvalues["responsable_id"] = login2display.get(
@@ -1206,7 +1207,7 @@ def formsemestre_enseignants_list(context, REQUEST, formsemestre_id, format="htm
         if sem_ens[ens]["email"]:
             sem_ens[ens]["_email_target"] = "mailto:%s" % sem_ens[ens]["email"]
 
-    sem_ens_list = sem_ens.values()
+    sem_ens_list = list(sem_ens.values())
     sem_ens_list.sort(lambda x, y: cmp(x["nomprenom"], y["nomprenom"]))
 
     # --- Generate page with table
@@ -1840,7 +1841,7 @@ def appreciation_add_form(
         app = apps[0]
         formsemestre_id = app["formsemestre_id"]
         etudid = app["etudid"]
-    if REQUEST.form.has_key("edit"):
+    if "edit" in REQUEST.form:
         edit = int(REQUEST.form["edit"])
     elif id:
         edit = 1
diff --git a/app/views/scodoc.py b/app/views/scodoc.py
index 88350058..c1654f52 100644
--- a/app/views/scodoc.py
+++ b/app/views/scodoc.py
@@ -30,13 +30,13 @@ Module main: page d'accueil, avec liste des départements
 
 Emmanuel Viennet, 2021
 """
+from __future__ import absolute_import
 import flask
-from flask import request, render_template, redirect
-from flask_login import login_required
-
-from app.views import scodoc_bp as bp
+from flask import render_template
 
 from scodoc_manager import sco_mgr
+
+from app.views import scodoc_bp as bp
 from app.scodoc import VERSION
 from app.scodoc.sco_permissions import Permission
 
diff --git a/app/views/scolar.py b/app/views/scolar.py
index 376eb90c..2b526080 100644
--- a/app/views/scolar.py
+++ b/app/views/scolar.py
@@ -29,24 +29,24 @@ Module scolar: issu de ScoDoc7 / ZScolar.py
 Emmanuel Viennet, 2021
 """
 
+from __future__ import absolute_import
 import sys
 import traceback
 import time
 import string
 import glob
 import re
-import urllib
-import urllib2
 import cgi
 import xml
 import jaxml
 
+# StringIO => io.StringIO or io.BytesIO for text and data respectively. #py3
 try:
     from cStringIO import StringIO
-except:
+except ImportError:
     from StringIO import StringIO
+
 from zipfile import ZipFile
-import thread
 import psycopg2
 
 from flask import g
@@ -122,7 +122,7 @@ from app.scodoc import sco_etud
 context = ScoDoc7Context("scolar")
 
 
-def sco_publish(route, function, permission, methods=["GET"]):
+def sco_publish(route, function, permission, methods=("GET",)):
     """Declare a route for a python function,
     protected by permission and called following ScoDoc 7 Zope standards.
     """
diff --git a/app/views/users.py b/app/views/users.py
index 8a25a481..49f0f21a 100644
--- a/app/views/users.py
+++ b/app/views/users.py
@@ -33,11 +33,11 @@ Vues s'appuyant sur auth et sco_users
 
 Emmanuel Viennet, 2021
 """
+from __future__ import absolute_import
 import re
 import jaxml
 
 from flask import g
-from flask import current_app, request
 from flask_login import current_user
 
 from app import db
@@ -50,9 +50,6 @@ from app.decorators import (
     scodoc7func,
     ScoDoc7Context,
     permission_required,
-    admin_required,
-    login_required,
-    ZRequest,
 )
 
 from app.scodoc import html_sco_header
@@ -64,6 +61,7 @@ from app.scodoc.sco_permissions_check import can_handle_passwd
 from app.scodoc.TrivialFormulator import TrivialFormulator, tf_error_message
 from app.views import users_bp as bp
 from scodoc_manager import sco_mgr
+from six.moves import range
 
 
 context = ScoDoc7Context("users")  # sco8
@@ -338,7 +336,7 @@ def create_user_form(context, REQUEST, user_name=None, edit=0):
     else:
         vals = tf[2]
         roles = set(vals["roles"]).intersection(editable_roles_strings)
-        if REQUEST.form.has_key("edit"):
+        if "edit" in REQUEST.form:
             edit = int(REQUEST.form["edit"])
         else:
             edit = 0
@@ -382,15 +380,15 @@ def create_user_form(context, REQUEST, user_name=None, edit=0):
                 return "\n".join(H) + "\n" + tf[1] + F
 
         if edit:  # modif utilisateur (mais pas passwd ni user_name !)
-            if (not can_choose_dept) and vals.has_key("dept"):
+            if (not can_choose_dept) and "dept" in vals:
                 del vals["dept"]
-            if vals.has_key("passwd"):
+            if "passwd" in vals:
                 del vals["passwd"]
-            if vals.has_key("date_modif_passwd"):
+            if "date_modif_passwd" in vals:
                 del vals["date_modif_passwd"]
-            if vals.has_key("user_name"):
+            if "user_name" in vals:
                 del vals["user_name"]
-            if (current_user.user_name == user_name) and vals.has_key("status"):
+            if (current_user.user_name == user_name) and "status" in vals:
                 del vals["status"]  # no one can't change its own status
 
             # traitement des roles: ne doit pas affecter les roles
@@ -459,11 +457,11 @@ def user_info_page(user_name, REQUEST=None):
 @bp.route("/get_user_list_xml")
 @permission_required(Permission.ScoView)
 @scodoc7func(context)
-def get_user_list_xml(context, dept=None, start="", limit=25, REQUEST=None):
+def get_user_list_xml(dept=None, start="", limit=25, REQUEST=None):
     """Returns XML list of users with name (nomplogin) starting with start.
     Used for forms auto-completion."""
     userlist = sco_users.get_user_list(dept=dept)
-    start = scu.suppression_diacritics(unicode(start, "utf-8"))
+    start = scu.suppression_diacritics(unicode(start, "utf-8"))  # utf8 #sco8
     start = scu.strlower(str(start))
     # TODO : à refaire avec une requete SQL #py3
     # (et en json)