diff --git a/modules/boursorama/pages/two_authentication.py b/modules/boursorama/pages/two_authentication.py
index 33bc97d2..2de11972 100644
--- a/modules/boursorama/pages/two_authentication.py
+++ b/modules/boursorama/pages/two_authentication.py
@@ -17,8 +17,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 from weboob.tools.browser import Page, BrowserIncorrectPassword
 import urllib2
 import re
@@ -86,7 +84,6 @@ class AuthenticationPage(Page):
         r = regex.search(info)
         token = r.group('value')
         #print "Extracted token", token
-        #self.print_cookies()
 
         #step2
         url = "https://" + DOMAIN + "/ajax/banque/otp.phtml"
@@ -97,7 +94,6 @@ class AuthenticationPage(Page):
         #print "after asking to send token authentification" \
         #   ,len(info), response.info()
 
-        #self.print_cookies()
 
         pin = raw_input('Enter the "Boursorama Banque" access code:')
         #print "Pin access code: ''%s''" % (pin)
@@ -108,8 +104,6 @@ class AuthenticationPage(Page):
         #info = response.read()
         #print "after pin authentification", len(info), response.info()
 
-        #self.print_cookies()
-
         url = "%s?" % (SECURE_PAGE)
         data = "org=/&device=%s" % (device)
         req = urllib2.Request(url, data, headers=headers)
@@ -117,9 +111,3 @@ class AuthenticationPage(Page):
 
         #result =        response.read()
         #print response, "\n", response.info()
-
-        #self.print_cookies()
-
-    def print_cookies(self):
-        for c in self.browser._ua_handlers["_cookies"].cookiejar:
-            print("%s : %s" % (c.name, c.value))
diff --git a/modules/cragr/web/pages.py b/modules/cragr/web/pages.py
index 5971b0f1..c1edec5b 100644
--- a/modules/cragr/web/pages.py
+++ b/modules/cragr/web/pages.py
@@ -17,8 +17,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 import re
 from decimal import Decimal
 
@@ -219,8 +217,8 @@ class CardsPage(Page):
             try:
                 t.id = t.unique_id(seen)
             except UnicodeEncodeError:
-                print(t)
-                print(t.label)
+                self.logger.debug(t)
+                self.logger.debug(t.label)
                 raise
 
             yield t
diff --git a/modules/europarl/pages.py b/modules/europarl/pages.py
index f6f83272..92de9a2f 100644
--- a/modules/europarl/pages.py
+++ b/modules/europarl/pages.py
@@ -18,8 +18,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 from weboob.tools.mech import ClientForm
 ControlNotFoundError = ClientForm.ControlNotFoundError
 
@@ -75,7 +73,6 @@ class VideoPage(Page):
         obj = self.parser.select(self.document.getroot(), 'meta[name=available]', 1)
         if obj is not None:
             value = obj.attrib['content']
-            print(value)
             m = re.match('(\d\d)-(\d\d)-(\d\d\d\d)\s*(\d\d):(\d\d)', value)
             if not m:
                 raise BrokenPageError('Unable to parse datetime: %r' % value)
diff --git a/modules/gdcvault/browser.py b/modules/gdcvault/browser.py
index 25987cc2..6b6c2783 100644
--- a/modules/gdcvault/browser.py
+++ b/modules/gdcvault/browser.py
@@ -18,8 +18,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 import urllib
 
 from weboob.tools.browser import Browser, BrowserIncorrectPassword, BrowserUnavailable,\
@@ -71,7 +69,6 @@ class GDCVaultBrowser(Browser):
         data = self.readurl('http://gdcvault.com/api/login.php',
                             urllib.urlencode(params))
         # some data returned as JSON, not sure yet if it's useful
-        #print data
 
         if data is None:
             self.openurl('/logout', '')
@@ -100,9 +97,7 @@ class GDCVaultBrowser(Browser):
             self.open_novisit(url)
             #headers = req.info()
         except HTTPError as e:
-            # print e.getcode()
             if e.getcode() == 302 and hasattr(e, 'hdrs'):
-                #print e.hdrs['Location']
                 if e.hdrs['Location'] in ['/', '/login']:
                     requires_account = True
                 else:
@@ -117,7 +112,6 @@ class GDCVaultBrowser(Browser):
             if video is None:
                 m = re.match('http://[w\.]*gdcvault.com/play/(?P<id>[\d]+)/?.*', url)
                 if m:
-                    # print m.group(1)
                     video = GDCVaultVideo(int(m.group(1)))
                 else:
                     raise BrowserUnavailable('Cannot find ID on page with redirection')
@@ -142,7 +136,6 @@ class GDCVaultBrowser(Browser):
         self.addheaders = [('Referer', 'http://gdcvault.com/'),
                            ("Content-Type" , 'application/x-www-form-urlencoded') ]
 
-        #print post_data
         # is_logged assumes html page
         self.location('http://gdcvault.com/search.php',
                       data=post_data, no_login=True)
@@ -151,7 +144,6 @@ class GDCVaultBrowser(Browser):
         return self.page.iter_videos()
 
     def latest_videos(self):
-        print("browser:latest_videos()")
         #self.home()
         self.location('/free')
         assert self.is_on_page(IndexPage)
diff --git a/modules/hellobank/browser.py b/modules/hellobank/browser.py
index f9a63815..a0202859 100644
--- a/modules/hellobank/browser.py
+++ b/modules/hellobank/browser.py
@@ -18,8 +18,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 import urllib
 import mechanize
 from datetime import datetime
@@ -86,7 +84,7 @@ class HelloBank(Browser):
 
         accounts = self.page.get_accounts()
         if len(accounts) == 0:
-            print('no accounts')
+            self.logger.warning('no accounts')
             # oops, no accounts? check if we have not exhausted the allowed use
             # of this password
             for img in self.document.getroot().cssselect('img[align="middle"]'):
diff --git a/modules/hellobank/perso/accounts_list.py b/modules/hellobank/perso/accounts_list.py
index 08d0fd32..c567ffb0 100644
--- a/modules/hellobank/perso/accounts_list.py
+++ b/modules/hellobank/perso/accounts_list.py
@@ -18,8 +18,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 from decimal import Decimal
 
 from weboob.capabilities.bank import Account
@@ -67,7 +65,7 @@ class AccountsList(Page):
                 l.append(account)
 
         if len(l) == 0:
-            print('no accounts')
+            self.logger.warning('no accounts')
             # oops, no accounts? check if we have not exhausted the allowed use
             # of this password
             for img in self.document.getroot().cssselect('img[align="middle"]'):
diff --git a/modules/okc/optim/profiles_walker.py b/modules/okc/optim/profiles_walker.py
index c6eaa2cf..77f62fcb 100644
--- a/modules/okc/optim/profiles_walker.py
+++ b/modules/okc/optim/profiles_walker.py
@@ -17,8 +17,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 from random import randint
 
 from weboob.tools.browser import BrowserUnavailable
@@ -101,7 +99,7 @@ class ProfilesWalker(Optimization):
                 self.profiles_queue.add(id)
                 return
             except Exception as e:
-                print(e)
+                self.logger.exception(e)
         finally:
             if self.view_cron is not None:
                 self.view_cron = self.sched.schedule(randint(5, 10), self.view_profile)
diff --git a/modules/societegenerale/captcha.py b/modules/societegenerale/captcha.py
index 7e5178c7..1e5a4b6c 100644
--- a/modules/societegenerale/captcha.py
+++ b/modules/societegenerale/captcha.py
@@ -17,9 +17,8 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 import hashlib
+from weboob.tools.log import getLogger
 
 try:
     from PIL import Image
@@ -113,6 +112,7 @@ class Tile(object):
     def __init__(self, _id):
         self.id = _id
         self.valid = False
+        self.logger = getLogger('societegenerale.captcha')
         self.map = []
 
     def __repr__(self):
@@ -134,7 +134,7 @@ class Tile(object):
             raise TileError('Tile not found ' + sum, self)
 
     def display(self):
-        print(self.checksum())
+        self.logger.debug(self.checksum())
         #im = Image.new('RGB', (24, 23))
         #im.putdata(self.map)
         #im.save('/tmp/%s.png' % self.checksum())
diff --git a/modules/transilien/pages.py b/modules/transilien/pages.py
index 6fdadc99..560f598b 100644
--- a/modules/transilien/pages.py
+++ b/modules/transilien/pages.py
@@ -18,8 +18,6 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import print_function
-
 import re
 
 from weboob.browser2.page import JsonPage, HTMLPage, method
@@ -144,7 +142,7 @@ class DeparturesPage2(HTMLPage):
             form['moiHoraire'] = '%s|%s' % (date.month, date.year)
             form['heureHoraire'] = date.hour
             form['minuteHoraire'] = date.minute
-        print(form)
+        self.logger.debug(form)
         form.submit()
 
 
diff --git a/tools/pyflakes.sh b/tools/pyflakes.sh
index 3e975bd3..97121bb7 100755
--- a/tools/pyflakes.sh
+++ b/tools/pyflakes.sh
@@ -9,6 +9,8 @@ grep -Fn '__future__ import with_statement' ${PYFILES} && echo 'Error: with_stat
 grep -nE '^[[:space:]]+except [[:alnum:] ]+,[[:alnum:] ]+' ${PYFILES} && echo 'Error: use new "as" way of naming exceptions' && exit 7
 grep -nE "^ *print " ${PYFILES} && echo 'Error: Use the print function' && exit 8
 grep -Fn ".has_key" ${PYFILES} && echo 'Error: Deprecated, use in' && exit 9
+MODULE_FILES=$(git ls-files|grep '^modules/.*\.py$'|tr '\n' ' ')
+grep -nE "^ *print(\(| )" ${MODULE_FILES} && echo 'Error: Use of print in modules is forbidden, use logger instead' && exit 10
 
 FLAKE8=""
 if which flake8 >/dev/null 2>&1; then