BUG: reading py2 pickles in py3 ok now

Author: jreback

RELEASE.rst

@@ -293,6 +293,7 @@ pandas 0.11.0
   - fixed pretty priniting of sets (GH3294_)
   - Panel() and Panel.from_dict() now respects ordering when give OrderedDict (GH3303_)
   - DataFrame where with a datetimelike incorrectly selecting (GH3311_)
+  - Ensure pickles created in py2 can be read in py3
 
 .. _GH3294: https://github.com/pydata/pandas/issues/3294
 .. _GH622: https://github.com/pydata/pandas/issues/622

pandas/core/common.py

@@ -1575,12 +1575,12 @@ def load(path):
     -------
     unpickled : type of object stored in file
     """
-    f = open(path, 'rb')
     try:
-        return pickle.load(f)
-    finally:
-        f.close()
-
+        with open(path,'rb') as fh:
+            return pickle.load(fh)
+    except:
+        with open(path,'rb') as fh:
+            return pickle.load(fh, encoding='latin1')
 
 class UTF8Recoder:
     """

pandas/io/tests/test_pickle.py

@@ -22,9 +22,13 @@ def setUp(self):
 
     def compare(self, vf):
 
-        fh = open(vf,'rb')
-        data = pickle.load(fh)
-        fh.close()
+        # py3 compat when reading py2 pickle
+        try:
+            with open(vf,'rb') as fh:
+                data = pickle.load(fh)
+        except:
+            with open(vf,'rb') as fh:
+                data = pickle.load(fh, encoding='latin1')
 
         for typ, dv in data.items():
             for dt, result in dv.items():