import random


def randName(n=5):
    return "".join(random.sample('zyxwvutsrqponmlkjihgfedcba', n))


def SuccessRequest(result=None, message="ok"):
    return {"code": 0, "result": result, "message": message}


def ErrorRequest(result=None, message="error"):
    return {"code": -1, "result": result, "message": message}