Fixes #11: add a __version__ constant

pandas_schema/__init__.py

@@ -1,3 +1,5 @@
 from .column import Column
 from .validation_warning import ValidationWarning
 from .schema import Schema
+
+__version__ = '0.3.3'

setup.py

@@ -1,12 +1,12 @@
 #!/usr/bin/env python
-
-# Always prefer setuptools over distutils
+import distutils
 import os
 import subprocess
+from pathlib import Path
 
 from setuptools import setup, find_packages
-import distutils
-from pathlib import Path
+
+from pandas_schema import __version__
 
 here = Path(__file__).parent
 readme = (here / 'README.rst')
@@ -61,7 +61,7 @@ def run(self):
 
 setup(
     name='pandas_schema',
-    version='0.3.2',
+    version=__version__,
     description='A validation library for Pandas data frames using user-friendly schemas',
     long_description=long_description,
     url='https://github.com/TMiguelT/PandasSchema',

test/test_metadata.py

@@ -0,0 +1,13 @@
+import unittest
+from packaging import version
+import pandas_schema
+
+
+class Version(unittest.TestCase):
+    def test_version(self):
+        """
+        Check that we have a __version__ defined, and that it's at least 0.3.0
+        """
+        self.assertIsNotNone(pandas_schema.__version__)
+        parsed = version.parse(pandas_schema.__version__)
+        self.assertGreaterEqual(parsed, version.Version('0.3.0'))

test/test_schema.py

@@ -6,6 +6,7 @@
 from pandas_schema.validation import LeadingWhitespaceValidation
 from pandas_schema.errors import PanSchArgumentError
 
+
 class UnorderedSchema(unittest.TestCase):
     schema = Schema([
         Column('a'),