fixup! Zope2: revive patches for Zope2.

product/ERP5Type/__init__.py

@@ -33,6 +33,11 @@
 from __future__ import absolute_import
 from App.config import getConfiguration
 from .patches import python, globalrequest, Pandas
+from App.version_txt import getZopeVersion
+if  getZopeVersion()[0] == 2: # BBB Zope2
+  IS_ZOPE2 = True
+else:
+  IS_ZOPE2 = False
 import six
 if six.PY2:
   from .patches import pylint
@@ -45,12 +50,6 @@ if six.PY3:
 else:
   WITH_LEGACY_WORKFLOW = True
 
-from App.version_txt import getZopeVersion
-if  getZopeVersion()[0] == 2: # BBB Zope2
-  IS_ZOPE2 = True
-else:
-  IS_ZOPE2 = False
-
 # We have a name conflict with source_reference and destination_reference,
 # which are at the same time property accessors for 'source_reference'
 # property, and category accessors (similar to getSourceValue().getReference())

product/ERP5Type/patches/pylint.py

@@ -20,6 +20,7 @@
 
 from __future__ import absolute_import
 import sys
+from Products.ERP5Type import IS_ZOPE2
 
 # TODO: make sure that trying to use it does not import isort, because the
 #       latter hacks Python in order to execute:
@@ -439,6 +440,25 @@ def fail_hook_BTrees(modname):
     return astng
 MANAGER.register_failed_import_hook(fail_hook_BTrees)
 
+if IS_ZOPE2: # BBB Zope2
+    # No name 'OOBTree' in module 'BTrees.OOBTree' (no-name-in-module)
+    # Unable to import 'BTrees.OOBTree' (import-error)
+    #
+    # When the corresponding C Extension (BTrees._Foo) is available, update
+    # BTrees.Foo namespace from the C extension, otherwise use Python definitions
+    # by dropping the `Py` suffix in BTrees.Foo symbols.
+    import BTrees
+    for module_name, module in inspect.getmembers(BTrees, inspect.ismodule):
+        if module_name[0] != '_':
+            continue
+        try:
+            extended_module = BTrees.__dict__[module_name[1:]]
+        except KeyError:
+            continue
+        else:
+            _register_module_extender_from_live_module(extended_module.__name__,
+                                                       module)
+
 # No name 'ElementMaker' in module 'lxml.builder' (no-name-in-module)
 #
 # imp.load_dynamic() on .so file