try to fix package version

Author: TomNicholas

datatree/__init__.py

@@ -1,5 +1,15 @@
 # flake8: noqa
 # Ignoring F401: imported but unused
+
+from pkg_resources import DistributionNotFound, get_distribution
+
+# import public API
 from .datatree import DataTree
 from .io import open_datatree
 from .mapping import map_over_subtree
+
+try:
+    __version__ = get_distribution(__name__).version
+except DistributionNotFound:  # noqa: F401; pragma: no cover
+    # package is not installed
+    pass

setup.py

@@ -14,7 +14,6 @@
 
 setup(
     name="datatree",
-    version="0.0.1",
     description="Hierarchical tree-like data structures for xarray",
     long_description=long_description,
     url="https://github.com/xarray-contrib/datatree",
@@ -34,10 +33,6 @@
     packages=find_packages(exclude=["docs", "tests", "tests.*", "docs.*"]),
     install_requires=install_requires,
     python_requires=">=3.9",
-    setup_requires="setuptools_scm",
-    use_scm_version={
-        "write_to": "datatree/_version.py",
-        "write_to_template": '__version__ = "{version}"',
-        "tag_regex": r"^(?P<prefix>v)?(?P<version>[^\+]+)(?P<suffix>.*)?$",
-    },
+    use_scm_version={"version_scheme": "post-release", "local_scheme": "dirty-tag"},
+    setup_requires=["setuptools_scm>=3.4", "setuptools>=42"],
 )