def __init__(self, target: Optional[str] = None, wheelhouse = None):
        """
        Initialize the PipData instance.

        :param target: Optional target path to search for packages
        """
        self.distro: Dict[str, Dict] = {}
        self.raw: Dict[str, Dict] = {}
        self.environment = self._get_environment()
        try:
            packages = self._get_packages(target or sys.executable, wheelhouse)
            self._process_packages(packages)
            self._populate_reverse_dependencies()
        except Exception as e:
            raise PipDataError(f"Failed to initialize package data: {str(e)}") from e

        Initialize the PipData instance.

        :param target: Optional target path to search for packages
        
winpython/piptree.py