Function is_present

examples/server/api_like_OAI.py:26–33

(json, key)

args = parser.parse_args()

def is_present(json, key):
    try:
        buf = json[key]
    except KeyError:
        return False
    if json[key] == None:
        return False
    return True

#convert chat to prompt
def convert_chat(messages):