<s> import uuid <EOL> class SessionId ( object ) : <EOL> EXPECTED_SESSION_HEADER_KEY = '<STR_LIT>' <EOL> SESSION_HEADER_KEY = '<STR_LIT>' <EOL> _session_id = None <EOL> @ classmethod <EOL> def get ( cls ) : <EOL> """<STR_LIT>""" <EOL> if cls . _session_id is None : <EOL> cls . _session_id = str ( uuid . uuid4 ( ) ) <EOL> return cls . _session_id </s>
