Fix __version__ import (#3)

-  Use standard try-except

Co-authored-by: b8raoult <[email protected]>

CHANGELOG.md

@@ -13,4 +13,5 @@ Keep it human-readable, your future self will thank you!
 ### Changed
 
 - Add more attributes to typed variables
+- Fix `__version__` import in init
 - Update copyright notice

src/anemoi/transform/__init__.py

@@ -4,3 +4,11 @@
 # In applying this licence, ECMWF does not waive the privileges and immunities
 # granted to it by virtue of its status as an intergovernmental organisation
 # nor does it submit to any jurisdiction.
+
+try:
+    # NOTE: the `_version.py` file must not be present in the git repository
+    #   as it is generated by setuptools at install time
+    from ._version import __version__  # type: ignore
+except ImportError:  # pragma: no cover
+    # Local copy or not installed with setuptools
+    __version__ = "999"