Use Python version of library as version (#969)

* Use Python version of library as version

* Fix test

Author: jorgensd

python/basix/__init__.py

@@ -13,7 +13,6 @@
 # WINDOWSDLL
 
 from basix._basixcpp import MapType
-from basix._basixcpp import __version__  # type: ignore
 from basix import cell, finite_element, lattice, polynomials, quadrature, sobolev_spaces
 from basix.cell import CellType, geometry, topology
 from basix.finite_element import (
@@ -33,6 +32,10 @@
 from basix.sobolev_spaces import SobolevSpace
 from basix.utils import index
 
+from importlib.metadata import metadata
+
+__version__ = metadata("fenics-basix")["Version"]
+
 __all__ = [
     "cell",
     "finite_element",

test/test_version.py

@@ -3,7 +3,6 @@
 # SPDX-License-Identifier: MIT
 
 import re
-from importlib.metadata import version
 
 import pytest
 
@@ -23,7 +22,7 @@ def is_canonical(version):
     )
 
 
-def test_version(python_version=version("fenics-basix"), cpp_version=basix.__version__):
+def test_version(python_version=basix.__version__, cpp_version=basix._basixcpp.__version__):
     assert is_canonical(python_version)
 
     # Strip Python-specific versioning (dev, post) and compare with C++