Support Python 3.8.

.gitignore

@@ -14,3 +14,11 @@ doc/_api
 eggs
 local.cfg
 parts
+coverage.xml
+testreport.xml
+.tox
+coverage-report
+.Python
+pip-selfcheck.json
+include
+lib

.travis.yml

@@ -1,18 +1,16 @@
 language: python
 python:
-- 2.7
+  - 2.7
+  - 3.8
 install:
-- pip install -U setuptools zc.buildout setuptools-scm coveralls
-- buildout -n
+  - pip install tox-travis coverage coveralls
 script:
-- bin/test --cache-clear --cov-report term-missing --cov src
+  - tox
 after_success:
   - coverage combine
   - coveralls
 cache:
   pip: true
-  directories:
-  - eggs/
 notifications:
   webhooks:
     secure: 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

CHANGES.rst

@@ -2,8 +2,14 @@
 Changes
 =======
 
-0.9.5 (unreleased)
-==================
+0.10 (unreleased)
+=================
+
+- Support Python 3.8.
+
+- Use tox as only test setup.
+
+- Switch dependency from ``ZODB3`` to ``ZODB``.
 
 - Migrate to Github.
 

setup.py

@@ -9,7 +9,7 @@ def read(filename):
 
 
 name = "gocept.reference"
-version = '0.9.5.dev0'
+version = '0.10.dev0'
 
 
 setup(
@@ -37,8 +37,10 @@ def read(filename):
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "License :: OSI Approved",
+        "Programming Language :: Python :: 2",
         "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 2 :: Only",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.8",
         "License :: OSI Approved :: Zope Public License",
         "Natural Language :: English",
         "Operating System :: OS Independent",
@@ -50,7 +52,7 @@ def read(filename):
     package_dir={'': 'src'},
     namespace_packages=['gocept'],
     install_requires=[
-        'ZODB3',
+        'ZODB',
         'setuptools',
         'transaction',
         'zope.annotation',
@@ -60,12 +62,12 @@ def read(filename):
         'zope.generations',
         'zope.interface',
         'zope.schema >= 3.6.0',
-        'zope.site',
         'zope.traversing',
     ],
     extras_require={
         'test': ['zope.app.testing',
                  'zope.app.zcmlfiles',
+                 'gocept.pytestlayer',
                  ]
     },
 )

src/gocept/reference/collection.py

@@ -126,7 +126,7 @@ def discard(self, value):
             self._data.remove(key)
 
     def pop(self):
-        key = iter(self._data).next()
+        key = next(iter(self._data))
         self._data.remove(key)
         self._unregister_key(key)
         return gocept.reference.reference.lookup(key)