python_project.py

from functools import cached_property
from pathlib import Path
from typing import Optional
import tomllib


class PythonProject:
    def __init__(self, path: Path):
        self.path = path
        self.toml = tomllib.loads(path.read_text())

    @cached_property
    def name(self) -> str:
        return self.find_value((
            ('project', 'name'),
            ('tool', 'poetry', 'name'),
        ))

    @cached_property
    def entrypoint_package_name(self) -> str:
        """
        The subdirectory name in the source virtual environment's site-packages that contains the function's entrypoint
        code.
        """
        # TODO : Parse out the project's package dir(s).  Use the first one if there are multiple.
        return self.name.replace('-', '_')

    def find_value(self, paths: tuple[tuple[str]]) -> str:
        for path in paths:
            value = self.get_value(path)
            if value is not None:
                return value
        raise Exception("TODO Exception find_value")

    def get_value(self, path: tuple[str]) -> Optional[str]:
        node = self.toml
        for name in path:
            node = node.get(name)
            if node is None:
                return None
        return node