Patch #1462313, bug #1443328: the pickle modules now can handle classes

that have __private names in their __slots__.

1 files changed, 13 insertions, 2 deletions

diff --git a/Lib/copy_reg.py b/Lib/copy_reg.py
index f499013..f87c50f 100644
--- a/Lib/copy_reg.py
+++ b/Lib/copy_reg.py
@@ -116,8 +116,19 @@ def _slotnames(cls):
         # Slots found -- gather slot names from all base classes
         for c in cls.__mro__:
             if "__slots__" in c.__dict__:
-                names += [name for name in c.__dict__["__slots__"]
-                               if name not in ("__dict__", "__weakref__")]
+                slots = c.__dict__['__slots__']
+                # if class has a single slot, it can be given as a string
+                if isinstance(slots, basestring):
+                    slots = (slots,)
+                for name in slots:
+                    # special descriptors
+                    if name in ("__dict__", "__weakref__"):
+                        continue
+                    # mangled names
+                    elif name.startswith('__') and not name.endswith('__'):
+                        names.append('_%s%s' % (c.__name__, name))
+                    else:
+                        names.append(name)
 
     # Cache the outcome in the class if at all possible
     try: