Add Python 3 compatibility, closes #2.

.travis.yml

@@ -2,11 +2,10 @@ language: python
 sudo: false
 python:
     - "2.7"
-    # - "3.3"
-    # - "3.4"
-    # - "3.5"
-    # - "pypy"
-    # - "pypy3"
+    - "3.3"
+    - "3.4"
+    - "3.5"
+    - "pypy"
 install:
     - python bootstrap.py
     - bin/buildout

CHANGES.rst

@@ -4,6 +4,8 @@ Changelog
 3.0 (unreleased)
 ----------------
 
+- #2: Add Python 3 compatibility.
+
 - #1: Resolve meta class conflict for PersistentMapping.
 
 - Update ExtensionClass and persistent headers and minimum versions.

setup.py

@@ -43,12 +43,12 @@
         "Programming Language :: Python",
         "Programming Language :: Python :: 2",
         "Programming Language :: Python :: 2.7",
-        # "Programming Language :: Python :: 3",
-        # "Programming Language :: Python :: 3.3",
-        # "Programming Language :: Python :: 3.4",
-        # "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.3",
+        "Programming Language :: Python :: 3.4",
+        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: Implementation :: CPython",
-        # "Programming Language :: Python :: Implementation :: PyPy",
+        "Programming Language :: Python :: Implementation :: PyPy",
     ],
     ext_modules=ext_modules,
     install_requires=[

src/Persistence/mapping.py

@@ -51,7 +51,7 @@ def __setstate__(self, state):
                 del state['_container']
             self.__dict__.update(state)
 
-else:
+else:  # pragma: no cover
 
     class PersistentMapping(six.with_metaclass(
             _Meta, Persistent, _BasePersistentMapping)):

src/Persistence/tests/test_persistent.py

@@ -13,15 +13,18 @@
 ##############################################################################
 
 import os
-from struct import pack
 import pickle
+import platform
+from struct import pack
 import time
 import unittest
 
 from Persistence import Persistent
 from persistent.picklecache import PickleCache
 from persistent.TimeStamp import TimeStamp
 
+py_impl = getattr(platform, 'python_implementation', lambda: None)
+IS_PYPY = py_impl() == 'PyPy'
 IS_PURE = 'PURE_PYTHON' in os.environ
 
 
@@ -110,7 +113,7 @@ def test_oid_jar_attrs(self):
 
         self.jar.add(obj)
 
-        if not IS_PURE:
+        if not (IS_PURE or IS_PYPY):
             # Can change oid of cache object since persistent 4.0.8
             del obj._p_oid
             obj._p_oid = 12

tox.ini

@@ -1,8 +1,6 @@
 [tox]
 envlist =
-    py27,py27-pure,coverage
-
-# py33,py34,py35,pypy,pypy3
+    py27,py27-pure,py33,py34,py35,pypy,coverage
 
 [testenv]
 install_command = pip install --no-cache-dir {opts} {packages}