--- a/src/pyams_utils/interfaces/__init__.py	Sat Nov 23 01:24:11 2019 +0100
+++ b/src/pyams_utils/interfaces/__init__.py	Sat Nov 23 14:57:24 2019 +0100
@@ -10,18 +10,20 @@
 # FOR A PARTICULAR PURPOSE.
 #
 
-"""PyAMS_utils interfaces module
+"""PyAMS_utils.interfaces package
 
 This module defines several generic constants and interfaces.
+
 It is also used to provide translations to common zope.schema exceptions.
 """
 
-__docformat__ = 'restructuredtext'
+from zope.interface import Interface
+from zope.schema.interfaces import ConstraintNotSatisfied, InvalidDottedName, InvalidId, \
+    InvalidURI, InvalidValue, NotAContainer, NotAnIterator, NotUnique, RequiredMissing, \
+    SchemaNotFullyImplemented, SchemaNotProvided, TooBig, TooLong, TooShort, TooSmall, Unbound, \
+    WrongContainedType, WrongType
 
-from zope.interface import Interface
-from zope.schema.interfaces import ConstraintNotSatisfied, InvalidDottedName, InvalidId, InvalidURI, InvalidValue, \
-    NotAContainer, NotAnIterator, NotUnique, RequiredMissing, SchemaNotFullyImplemented, SchemaNotProvided, TooBig, \
-    TooLong, TooShort, TooSmall, Unbound, WrongContainedType, WrongType
+__docformat__ = 'restructuredtext'
 
 from pyams_utils import _
 
@@ -50,7 +52,6 @@
 NotAContainer.__doc__ = _("""Not a container""")
 NotAnIterator.__doc__ = _("""Not an iterator""")
 
-
 #
 # Custom permissions
 #
@@ -65,7 +66,8 @@
 '''View permission is a custom permission used to view contents'''
 
 MANAGE_PERMISSION = 'manage'
-'''Permission used to manage basic information; this permission is generally not used by custom contents'''
+'''Permission used to manage basic information; this permission is generally not used by custom
+contents'''
 
 VIEW_SYSTEM_PERMISSION = 'pyams.ViewSystem'
 '''Permission used to access management screens'''
@@ -106,14 +108,15 @@
 
     This interface can be used to register an "interface's object factory".
     For a given interface, such factory can be used to get an instance of an object providing
-    this interface; several factories can be registered for the same interface if they have distinct
-    names. See :py:mod:`pyams_utils.factory` module.
+    this interface; several factories can be registered for the same interface if they have
+    distinct names. See :py:mod:`pyams_utils.factory` module.
     """
 
 
 class ICacheKeyValue(Interface):
     """Interface used to get string representation of a given object as cache key
 
-    Several default adapters are given for objects (using their "id()"), strings (using string as key)
-    and for persistent objects (using their persistent OID); you are free to provide your own adapters.
+    Several default adapters are given for objects (using their "id()"), strings (using string as
+    key) and for persistent objects (using their persistent OID); you are free to provide your
+    own adapters.
     """