fix: make the version attr of the package available without install

Author: ElouenGinat

docs/conf.py

@@ -9,30 +9,18 @@
 import re
 import sys
 from pathlib import Path
-import tomllib
+from importlib.metadata import version
 
 DOCS_DIR = Path(__file__).resolve().parent
 ROOT_DIR = DOCS_DIR.parent
 
 sys.path.append(str(ROOT_DIR))
 sys.path.append(str(ROOT_DIR / "src"))
 
-
-def _read_release() -> str:
-    pyproject_file = ROOT_DIR / "pyproject.toml"
-    data = tomllib.loads(pyproject_file.read_text(encoding="utf-8"))
-
-    try:
-        return data["project"]["version"]
-    except KeyError as exc:
-        raise RuntimeError(
-            f"Could not determine khisto version from {pyproject_file}"
-        ) from exc
-
 project = 'khisto-python'
 copyright = '2026, The Khiops Team'
 author = 'The Khiops Team'
-release = _read_release()
+release = version("khisto")
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration

pyproject.toml

@@ -80,6 +80,7 @@ dev = [
     {include-group = "test"},
     {include-group = "lint"},
     {include-group = "docs"},
+    "tomli>=2.0.0; python_version < '3.11'" # TODO : Remove on Python 3.10 EOL
 ]
 
 [build-system]

src/khisto/__init__.py

@@ -10,11 +10,22 @@
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
 
-ROOT_DIR = Path(os.path.dirname(os.path.abspath(__file__))).parent.absolute()
-
+ROOT_DIR = Path(__file__).resolve().parent.parent
 KHISTO_BIN_DIR = os.environ.get("KHISTO_BIN_DIR", "khisto")
 
-__version__ = version("khisto")
+if (ROOT_DIR / "pyproject.toml").exists():
+    # TODO : Remove on Python 3.10 EOL
+    try:
+        import tomllib as tomli
+    except ModuleNotFoundError:
+        import tomli
+
+    with open(ROOT_DIR / "pyproject.toml", "rt") as f:
+        __version__ = tomli.load(f)["project"]["version"]
+else:
+    from importlib.metadata import version  # noqa: E402
+
+    __version__ = version("khisto")
 
 from .array import histogram  # noqa: E402
 from .core import HistogramResult  # noqa: E402