launchpad.py

class MyLaunchpad(object):
    """Manage an authorised user's launchpad account"""
    def __init__(self, project, credentials=None):
        if not credentials:
            credentials = DEFAULT_CRED % project
        logging.info(_("Save cache file to %s") % credentials)
        self._project = project
        self._crds    = None
        self._cfile   = credentials
        self._me      = None
        self._lp = None

    @property
    def credentials(self):
        """Loaded credentials object"""
        if not self._crds:
            self._crds = Credentials(self._project)
            if os.path.exists(self._cfile):
                self._crds.load(open(self._cfile))
            else:
                self.request_credentials()
        return self._crds