python proto文件 引入报错，求指教

Question

syntax = "proto3";
package GameProto;
import BaseProto.proto; // 引入BaseProto.proto

message MsgWeaponSkillData
{
    int32 skillID = 1;
    int32 curExp = 2;
    int32 maxExp = 3;
}

这个import 后面报错

public, string or weak expected, got 'BaseProto'