transfer from wallet to spot not work

[digidecor3d]

def user_transfer(self,type,amount,symbol):
    """
    参数名称         是否必须  类型     描述  默认值   取值范围
    symbol	        true	string	交易对	----	EOS,BTC...
    amount	        true	double	转账金额	----	> 0
    type	        true	integer	转账类型	----	0钱包转币币; 1币币转钱包
    """
    params = [
        {
            'type': type,      # 划转方向
            'amount':amount,   # 划转数量
            'symbol': symbol   # 划转币种

        }
    ]

    request_path = self.__url + "/v2/assets/transfer/spot"
    return api_key_post(request_path, params, self.__access_key, self.__secret_key)