should be part of r35226

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35227 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/File.py

@@ -36,6 +36,8 @@ from Products.ERP5.Document.Document import Document, VALID_TEXT_FORMAT_LIST
 from Products.ERP5.Document.Document import ConversionError
 from Products.ERP5Type.Base import Base, removeIContentishInterface
 from Products.CMFDefault.File import File as CMFFile
+from OFS.Image import Pdata
+import cStringIO
 
 # Mixin Import
 from Products.ERP5.mixin.cached_convertable import CachedConvertableMixin