version number is now set in exactly one place

setup.py

@@ -1,29 +1,29 @@
 from setuptools import setup
+from nd2reader import __version__
 
-VERSION = "2.0.0"
-
-setup(
-    name="nd2reader",
-    packages=['nd2reader', 'nd2reader.model', 'nd2reader.driver', 'nd2reader.parser', 'nd2reader.common'],
-    install_requires=[
-        'numpy>=1.6.2, <2.0',
-        'six>=1.4, <2.0',
-        'xmltodict>=0.9.2, <1.0'
-    ],
-    version=VERSION,
-    description='A tool for reading ND2 files produced by NIS Elements',
-    author='Jim Rybarski',
-    author_email='jim@rybarski.com',
-    url='https://github.com/jimrybarski/nd2reader',
-    download_url='https://github.com/jimrybarski/nd2reader/tarball/%s' % VERSION,
-    keywords=['nd2', 'nikon', 'microscopy', 'NIS Elements'],
-    classifiers=['Development Status :: 5 - Production/Stable',
-                 'Intended Audience :: Science/Research',
-                 'License :: Freely Distributable',
-                 'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
-                 'Operating System :: POSIX :: Linux',
-                 'Programming Language :: Python :: 2.7',
-                 'Programming Language :: Python :: 3.4',
-                 'Topic :: Scientific/Engineering',
-                 ]
-)
+if __name__ == '__main__':
+    setup(
+        name='nd2reader',
+        packages=['nd2reader', 'nd2reader.model', 'nd2reader.driver', 'nd2reader.parser', 'nd2reader.common'],
+        install_requires=[
+            'numpy>=1.6.2, <2.0',
+            'six>=1.4, <2.0',
+            'xmltodict>=0.9.2, <1.0'
+        ],
+        version=__version__,
+        description='A tool for reading ND2 files produced by NIS Elements',
+        author='Jim Rybarski',
+        author_email='jim@rybarski.com',
+        url='https://github.com/jimrybarski/nd2reader',
+        download_url='https://github.com/jimrybarski/nd2reader/tarball/%s' % __version__,
+        keywords=['nd2', 'nikon', 'microscopy', 'NIS Elements'],
+        classifiers=['Development Status :: 5 - Production/Stable',
+                     'Intended Audience :: Science/Research',
+                     'License :: Freely Distributable',
+                     'License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)',
+                     'Operating System :: POSIX :: Linux',
+                     'Programming Language :: Python :: 2.7',
+                     'Programming Language :: Python :: 3.4',
+                     'Topic :: Scientific/Engineering',
+                     ]
+    )

tests/version.py

@@ -0,0 +1,8 @@
+import nd2reader
+import unittest
+
+
+class VersionTests(unittest.TestCase):
+    def test_versions_in_sync(self):
+        # just make sure the version number exists and is the type we expect
+        self.assertEqual(type(nd2reader.__version__), str)