Discord.py 名称'；用户'；未定义提及

当一个用户ping另一个用户时，我正在尝试获取！让用户提及并在数据库中添加一个点！虽然用户没有定义！并且不能为用户注册任何被ping的点

import sqlite3
from discord.ext import commands

client = commands.Bot(command_prefix = "ping")

POINTS = 0

@client.event
async def on_ready():
    db = sqlite3.connect("ping.sqlite")
    cursor = db.cursor()
    cursor.execute('''
        CREATE TABLE IF NOT EXISTS main(
        user_id TEXT,
        points INTERGER
        )
        ''')
    print("Looking for Pings!")

@client.event
async def on_message(message):
    USER = user.mention.id
    db = sqlite3.connect("ping.sqlite")
    cursor = db.cursor()
    cursor.execute(f"SELECT user_id FROM main WHERE user_id = {USER}")
    result = cursor.fetchone()
    if result is None:
        sql = ("INSERT INTO main(user_id, points) VALUES(?,?)")
        val = (USER, POINTS)
    elif result is not None:
        sql = ("UPDATE main SET channel_id = ? WHERE guild_id = ?")
        val = (ctx.guild.id, channel.id)
    cursor.execute(sql, val)
    db.commit()
    cursor.close()
    db.close()

client.run(TOKEN)

您可以使用这个简单的if语句来查找消息中是否有任何用户被ping！并且位于该特定消息中所有ping用户的列表类型中 您还可以遍历

消息。提及

以获取所有ping用户

if len(message.mentions) > 0:
        all_pinged_users = [user for user in message.mentions]
        #it will give all pinged user object in all_pinged_users and you can do anything with that!
    else:
        #no user is pinged