explicit is better than implicit

src/OFS/Image.py

@@ -34,7 +34,6 @@ from webdav.interfaces import IWriteLock
 from webdav.Lockable import ResourceLockedError
 from ZPublisher import HTTPRangeSupport
 from ZPublisher.HTTPRequest import FileUpload
-from ZPublisher.Iterators import filestream_iterator
 from zExceptions import Redirect
 from zope.contenttype import guess_content_type
 from zope.interface import implementedBy
@@ -651,6 +650,9 @@ class File(Persistent, Implicit, PropertyManager,
 
         return ''
 
+InitializeClass(File)
+
+
 manage_addImageForm=DTMLFile('dtml/imageAdd',globals(),
                              Kind='Image',kind='image')
 def manage_addImage(self, id, file, title='', precondition='', content_type='',
@@ -890,6 +892,8 @@ class Image(File):
 
         return '%s />' % result
 
+InitializeClass(Image)
+
 
 def cookId(id, title, file):
     if not id and hasattr(file,'filename'):

src/webdav/LockItem.py

@@ -15,6 +15,7 @@
 
 import time
 
+from AccessControl.class_init import InitializeClass
 from AccessControl.owner import ownerInfo
 from AccessControl.SecurityInfo import ClassSecurityInfo
 from Persistence import Persistent
@@ -171,7 +172,6 @@ class LockItem(Persistent):
         return s
 
     def asXML(self):
-
         s = """<?xml version="1.0" encoding="utf-8" ?>
 <d:prop xmlns:d="DAV:">
  <d:lockdiscovery>
@@ -179,3 +179,5 @@ class LockItem(Persistent):
  </d:lockdiscovery>
 </d:prop>""" % self.asLockDiscoveryProperty(ns="d")
         return s
+
+InitializeClass(LockItem)