bounty将在6天后过期。回答此问题可获得+50的声望奖励。Mudit Dagar正在寻找规范答案：请帮我解决这个问题，并采取50信誉

import discord
import mysql.connector
client = discord.Client(intents=discord.Intents.all())
mylb = mysql.connector.connect(
    host='localhost',[![enter image description here][1]][1]
    user='root',
    password="",
    database="worst")
cursor = mylb.cursor()

@client.event
async def on_ready():
    print('We have logged in as {0.user}'.format(client))

@client.event
async def on_message(message):
    
    if message.author == client.user:
        return

    if message.content.startswith('$hello'):
        await message.channel.send('Hello!')
    if message.content.startswith('$howareyou'):
        await message.channel.send('fine')
    a = 0
    if message.content.startswith('$cash'):
        cursor.execute("select cash from mudit")
        
        b = cursor.fetchone()
        await message.channel.send(b[0])
        c = int(b[0])
    if message.content.startswith('$daily'):
        a = a+10
        await message.channel.send(a)
        sql = ("""UPDATE mudit SET cash = (%s) WHERE id = (1)"""%(c+10))
        # sql = "insert into mudit (id,cash) values (%s,%s)"
      
        cursor.execute(sql)
        mylb.commit()
  
client.run('my token')
UnboundLocalError: cannot access local variable 'c' where it is not associated with a 
value

在这段代码中，我希望变量c以整数格式获取值，并将其存储在数据库的cash列中，我解压缩了列表，并将解压缩后的值转换为整数，但变量c仍然没有将值存储为文字。