build: fix installation

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "grovers-visualizer"
-version = "0.4.0"
-description = "Add your description here"
+version = "0.4.1"
+description = "A tiny Python package that steps through Grover’s Search algorithm."
 readme = "README.md"
 requires-python = ">=3.13"
 dependencies = [
@@ -21,16 +21,17 @@ ui = ["dearpygui==2.0.0"]
 [dependency-groups]
 dev = ["mypy~=1.15", "ruff~=0.11"]
 
-[build-system]
-requires = ["hatchling"]
-build-backend = "hatchling.build"
-
 [tool.hatch.build]
 sources = ["src"]
+packages = ["grovers_visualizer"]
 
 [tool.hatch.build.targets.wheel]
 packages = ["src/grovers_visualizer"]
 
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
 [tool.mypy]
 mypy_path = "src"
 check_untyped_defs = true

src/grovers_visualizer/__main__.py

@@ -1,3 +1,12 @@
+#!/usr/bin/env python
+
+"""Grover's Algorithm Visualizer.
+
+This script builds a Grover search circuit based on user input, runs the
+simulation using Qiskit's Aer simulator, and visualizes the results
+using matplotlib.
+"""
+
 from .main import main
 
 if __name__ == "__main__":

src/grovers_visualizer/utils.py

@@ -1,8 +1,7 @@
-import tomllib
 from collections.abc import Iterator
+from importlib.metadata import PackageNotFoundError, version
 from itertools import product
 from math import floor, pi, sqrt
-from pathlib import Path
 
 from .state import QubitState
 
@@ -31,14 +30,12 @@ def get_bar_color(state: str, target_state: QubitState | None, iteration: int, o
     return "orange"
 
 
-def get_app_version(pyproject_path: str = "pyproject.toml") -> str:
-    """Reads the version from the [project] section of pyproject.toml."""
-    path = Path(pyproject_path)
-    if not path.is_file():
-        raise FileNotFoundError(f"{pyproject_path} not found.")
-    with path.open("rb") as f:
-        data = tomllib.load(f)
+def get_app_version() -> str:
+    """Return the installed package version, e.g. '0.4.0'.
+
+    Falls back to 'unknown' if not installed as a distribution.
+    """
     try:
-        return str(data["project"]["version"])
-    except KeyError:
-        raise KeyError("Version not found in [project] section of pyproject.toml.")
+        return version("grovers-visualizer")
+    except PackageNotFoundError:
+        return "unknown"