add version attribute

setup.py

@@ -2,7 +2,22 @@
 
 from setuptools import setup, Extension, find_packages
 from Cython.Build import cythonize
+import os 
 
+def read(rel_path: str) -> str:
+    here = os.path.abspath(os.path.dirname(__file__))
+    # intentionally *not* adding an encoding option to open, See:
+    #   https://github.com/pypa/virtualenv/issues/201#issuecomment-3145690
+    with open(os.path.join(here, rel_path)) as fp:
+        return fp.read()
+
+def get_version(rel_path: str) -> str:
+    for line in read(rel_path).splitlines():
+        if line.startswith("__version__"):
+            # __version__ = "0.9"
+            delim = '"' if '"' in line else "'"
+            return line.split(delim)[1]
+    raise RuntimeError("Unable to find version string.")
 
 cstuff = Extension('mrsqm.mrsqm_wrapper',
                    language='c++',
@@ -13,7 +28,7 @@
 
 setup(
     name='mrsqm',
-    version="0.0.5",
+    version=get_version("src/mrsqm/__init__.py"),
     author='Thach Le Nguyen',
     author_email='thalng@protonmail.com',
     python_requires='>=3.7',

src/mrsqm/__init__.py

@@ -1,3 +1,5 @@
 # noinspection PyUnresolvedReferences
+__version__ = "0.0.6"
+
 from mrsqm.mrsqm_wrapper import MrSQMClassifier
 from mrsqm.mrsqm_wrapper import MrSQMTransformer