Add version

setup.py

@@ -99,15 +99,23 @@ def build_extension(self, ext):
         subprocess.check_call(['cmake', ext.sourcedir] + cmake_args, cwd=self.build_temp, env=env)
         subprocess.check_call(['cmake', '--build', '.'] + build_args, cwd=self.build_temp)
 
+
+version = {}
+here = os.path.abspath(os.path.dirname(__file__))
+with open(os.path.join(here,"src/pymatching/_version.py")) as fp:
+    exec(fp.read(), version)
+
+
 setup(
     name='PyMatching',
-    version='0.0.1',
+    version=version['__version__'],
     author='Oscar Higgott',
     description='A C++ implementation of the Minimum Weight Perfect Matching decoder, with Python bindings.',
     ext_modules=[CMakeExtension('pymatching._cpp_mwpm')],
     packages=find_packages("src"),
     package_dir={'':'src'},
     cmdclass=dict(build_ext=CMakeBuild),
     install_requires=['scipy', 'numpy', 'networkx', 'cmake'],
+    python_requires='>=3.6',
     zip_safe=False,
 )

src/pymatching/_version.py

@@ -0,0 +1,15 @@
+# Copyright 2020 Oscar Higgott
+
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#      http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+__version__ = "0.2.0.dev0"