解决导入bug，为什么导入类会报错(•́へ•́╬)

Tool.py

@@ -10,8 +10,7 @@ class Tool:
         self.typeid = typeid
 
 
-    @staticmethod
-    def get_tool_name(id):
+def get_tool_name(id):
         conn=pymysql.connect(host = '192.168.31.9' # 连接名称，默认
         ,user = 'saipo'
         ,passwd='Grasste0403' # 密码

main.py

@@ -1,18 +1,17 @@
 import json
-from .Tool import *
 from astrbot.api.event import filter, AstrMessageEvent, MessageEventResult
 from astrbot.api.star import Context, Star, register
 from astrbot.api import logger
 import random
 from .back import time_long, volume, isUserExist, insertUser, seconds_to_hms, ml_to_l_ml, get_user_name
 import pymysql
+from .Tool import get_tool_name
 
 @register("helloworld", "YourName", "一个简单的 Hello World 插件", "1.0.0")
 class MyPlugin(Star):
     def __init__(self, context: Context):
         super().__init__(context)
     
-    
     @filter.command("打打我的")
     async def dajiao(self, event: AstrMessageEvent):
         if isUserExist(event.get_sender_id()) != True:
@@ -153,12 +152,12 @@ class MyPlugin(Star):
             baglist_str = "背包空空如也"
         else:
             for item in baglist:
-                if Tool.get_tool_name(item["id"]) is None:
+                if get_tool_name(item["id"]) is None:
                     cur.close()
                     conn.close()
                     yield event.plain_result(f"背包存在异常！")
                 else:
-                    baglist_str += f"{Tool.get_tool_name(item['id'])} x {item['num']}\n"
+                    baglist_str += f"{get_tool_name(item['id'])} x {item['num']}\n"
         cur.close()
         conn.close()
         yield event.plain_result(f"背包列表：\n{baglist_str}")