def load_installed_version(self):
        installed_packages = get_installed_pypackages()
        if self.package in installed_packages:
            self.version = "=={}".format(
                installed_packages[self.package].version)
def __init__(self, root_path: str, defaults: t.Optional[dict] = None) -> None:
        dict.__init__(self, defaults or {})
        self.root_path = root_path