Drop support for Python 3.4; add support for Python 3.8, 3.9, 3.10.

Lint the code.

.meta.toml

@@ -20,3 +20,8 @@ testenv-deps = [
 
 [coverage]
 fail-under = 100
+
+[manifest]
+additional-rules = [
+    "recursive-include src *.zcml",
+    ]

CHANGES.rst

@@ -4,7 +4,9 @@ Changes
 4.4 (unreleased)
 ----------------
 
-- Nothing changed yet.
+- Drop support for Python 3.4.
+
+- Add support for Python 3.8, 3.9, 3.10.
 
 
 4.3 (2018-10-05)

MANIFEST.in

@@ -12,3 +12,4 @@ recursive-include docs *.txt
 recursive-include docs Makefile
 
 recursive-include src *.py
+recursive-include src *.zcml

setup.py

@@ -28,6 +28,7 @@ def read(*rnames):
     with open(os.path.join(os.path.dirname(__file__), *rnames)) as f:
         return f.read()
 
+
 ZCML_REQUIRES = [
     'zope.component[zcml]',
     'zope.configuration',
@@ -36,51 +37,55 @@ def read(*rnames):
 
 TESTS_REQUIRE = ZCML_REQUIRES
 
-setup(name='zope.size',
-      version=read('version.txt').strip(),
-      url='http://github.com/zopefoundation/zope.size',
-      license='ZPL 2.1',
-      description=\
-          'Interfaces and simple adapter that give the size of an object',
-      keywords="size display human bytes",
-      author='Zope Foundation and Contributors',
-      author_email='zope-dev@zope.org',
-      long_description=read('README.rst') + '\n\n' + read('CHANGES.rst'),
-      classifiers=[
-          'Development Status :: 5 - Production/Stable',
-          'Intended Audience :: Developers',
-          'License :: OSI Approved :: Zope Public License',
-          'Programming Language :: Python',
-          'Programming Language :: Python :: 2',
-          'Programming Language :: Python :: 2.7',
-          'Programming Language :: Python :: 3',
-          'Programming Language :: Python :: 3.4',
-          'Programming Language :: Python :: 3.5',
-          'Programming Language :: Python :: 3.6',
-          'Programming Language :: Python :: 3.7',
-          'Programming Language :: Python :: Implementation :: CPython',
-          'Programming Language :: Python :: Implementation :: PyPy',
-          'Natural Language :: English',
-          'Operating System :: OS Independent',
-          'Topic :: Internet :: WWW/HTTP',
-          'Topic :: Software Development',
-      ],
-      packages=find_packages('src'),
-      package_dir={'': 'src'},
-      namespace_packages=['zope'],
-      extras_require={
-          'zcml': ZCML_REQUIRES,
-          'test': TESTS_REQUIRE,
-          'docs': [
-              'Sphinx',
-              'repoze.sphinx.autointerface',
-          ],
-      },
-      install_requires=[
-          'setuptools',
-          'zope.interface',
-          'zope.i18nmessageid',
-      ],
-      include_package_data=True,
-      zip_safe=False,
+setup(
+    name='zope.size',
+    version=read('version.txt').strip(),
+    url='http://github.com/zopefoundation/zope.size',
+    license='ZPL 2.1',
+    description='Interfaces and simple adapter that give the size of an'
+                ' object',
+    keywords="size display human bytes",
+    author='Zope Foundation and Contributors',
+    author_email='zope-dev@zope.org',
+    long_description=read('README.rst') + '\n\n' + read('CHANGES.rst'),
+    classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: Zope Public License',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: Implementation :: CPython',
+        'Programming Language :: Python :: Implementation :: PyPy',
+        'Natural Language :: English',
+        'Operating System :: OS Independent',
+        'Topic :: Internet :: WWW/HTTP',
+        'Topic :: Software Development',
+    ],
+    packages=find_packages('src'),
+    package_dir={
+        '': 'src'},
+    namespace_packages=['zope'],
+    extras_require={
+        'zcml': ZCML_REQUIRES,
+        'test': TESTS_REQUIRE,
+        'docs': [
+            'Sphinx',
+            'repoze.sphinx.autointerface',
+        ],
+    },
+    install_requires=[
+        'setuptools',
+        'zope.interface',
+        'zope.i18nmessageid',
+    ],
+    include_package_data=True,
+    zip_safe=False,
 )

src/zope/__init__.py

@@ -1 +1 @@
-__import__('pkg_resources').declare_namespace(__name__) # pragma: no cover
+__import__('pkg_resources').declare_namespace(__name__)  # pragma: no cover

src/zope/size/__init__.py

@@ -21,6 +21,7 @@
 
 _ = MessageFactory('zope')
 
+
 @implementer(ISized)
 class DefaultSized(object):
     """
@@ -48,6 +49,7 @@ def sizeForDisplay(self):
             return byteDisplay(size)
         return _('not-available', 'n/a')
 
+
 def byteDisplay(size):
     """
     Returns a size with the correct unit (KB, MB), given the size in bytes.

src/zope/size/tests.py

@@ -30,7 +30,7 @@ def test_configure_zcml_should_be_loadable(self):
         try:
             zope.configuration.xmlconfig.XMLConfig(
                 'configure.zcml', zope.size)()
-        except Exception as e: # pragma: no cover
+        except Exception as e:  # pragma: no cover
             self.fail(e)
 
     def test_configure_should_register_n_components(self):
@@ -113,4 +113,3 @@ def test_byteDisplay(self):
         self.assertEqual(byteDisplay(2048).mapping, {'size': '2'})
         self.assertEqual(byteDisplay(2000000), '${size} MB')
         self.assertEqual(byteDisplay(2000000).mapping, {'size': '1.91'})
-