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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _init_project_service(self, version):
 """ Method to initialize the Project Service from the config data Args: version (string):
 Version of Boss API to use. Returns: None Raises: (KeyError):
 if given invalid version. """

        project_cfg = self._load_config_section(CONFIG_PROJECT_SECTION)
        self._token_project = project_cfg[CONFIG_TOKEN]
        proto = project_cfg[CONFIG_PROTOCOL]
        host = project_cfg[CONFIG_HOST]

        self._project = ProjectService(host, version)
        self._project.base_protocol = proto
        self._project.set_auth(self._token_project)