diff -r 2e03bb4372b2 -r f09efeead7f9 cubicweb/__init__.py
--- a/cubicweb/__init__.py	Tue Jun 30 10:00:53 2015 +0200
+++ b/cubicweb/__init__.py	Wed Nov 09 11:42:33 2016 +0100
@@ -29,24 +29,27 @@
 import warnings
 import zlib
 
-warnings.filterwarnings('ignore', category=UserWarning,
-                        message='.*was already imported',
-                        module='.*pygments')
-
-
 from six import PY2, binary_type, text_type
 from six.moves import builtins
 
+from logilab.common.deprecation import deprecated
+from logilab.common.logging_ext import set_log_methods
+from yams.constraints import BASE_CONVERTERS, BASE_CHECKERS
+from yams.schema import role_name as rname
+
+from cubicweb.__pkginfo__ import version as __version__   # noqa
+
+# make all exceptions accessible from the package
+from logilab.common.registry import ObjectNotFound, NoSelectableObject, RegistryNotFound  # noqa
+from yams import ValidationError
+from cubicweb._exceptions import *  # noqa
+
 if PY2:
     # http://bugs.python.org/issue10211
     from StringIO import StringIO as BytesIO
 else:
     from io import BytesIO
 
-from logilab.common.deprecation import deprecated
-from logilab.common.logging_ext import set_log_methods
-from yams.constraints import BASE_CONVERTERS, BASE_CHECKERS
-
 # ignore the pygments UserWarnings
 warnings.filterwarnings('ignore', category=UserWarning,
                         message='.*was already imported',
@@ -54,21 +57,12 @@
 
 # pre python 2.7.2 safety
 logging.basicConfig()
+set_log_methods(sys.modules[__name__], logging.getLogger('cubicweb'))
 
 # this is necessary for i18n devtools test where chdir is done while __path__ is relative, which
 # breaks later imports
-__path__[0] = os.path.abspath(__path__[0])
-CW_SOFTWARE_ROOT = __path__[0]
-
-
-from cubicweb.__pkginfo__ import version as __version__   # noqa
-
-
-set_log_methods(sys.modules[__name__], logging.getLogger('cubicweb'))
-
-# make all exceptions accessible from the package
-from cubicweb._exceptions import *  # noqa
-from logilab.common.registry import ObjectNotFound, NoSelectableObject, RegistryNotFound  # noqa
+__path__[0] = os.path.abspath(__path__[0])  # noqa
+CW_SOFTWARE_ROOT = __path__[0]  # noqa
 
 
 # '_' is available to mark internationalized string but should not be used to
@@ -249,9 +243,6 @@
     return _decorator
 
 
-from yams.schema import role_name as rname
-
-
 def validation_error(entity, errors, substitutions=None, i18nvalues=None):
     """easy way to retrieve a :class:`cubicweb.ValidationError` for an entity or eid.