add version attribute as per Python convention

bitsandbytes/__init__.py

@@ -24,4 +24,6 @@ __pdoc__ = {
     "optim.optimizer.MockArgs": False,
 }
 
+__version__ = "0.41.1"
+
 PACKAGE_GITHUB_URL = "https://github.com/TimDettmers/bitsandbytes"

setup.py

@@ -6,6 +6,9 @@ import glob
 import os
 
 from setuptools import find_packages, setup
+import bitsandbytes as bnb
+
+VERSION = bnb.__version__
 
 libs = list(glob.glob("./bitsandbytes/libbitsandbytes*.so"))
 libs = [os.path.basename(p) for p in libs]
@@ -18,7 +21,7 @@ def read(fname):
 
 setup(
     name=f"bitsandbytes",
-    version=f"0.41.1",
+    version=VERSION,
     author="Tim Dettmers",
     author_email="dettmers@cs.washington.edu",
     description="k-bit optimizers and matrix multiplication routines.",