Python 如何阻止特定角色在discord.py中发言？

所以，现在我想让一个特定的角色不能在频道里讲话。我有可以工作的代码，但只限制

ctx.guild.default\u角色（@everybody）说话

import discord
import os
from discord.ext import commands
from keep_alive import keep_alive
import asyncio

bot = commands.Bot(command_prefix='+')

@bot.event
async def on_ready():
    print(f'''We have logged in as {bot.user.name}''')
  
@bot.command()
@commands.guild_only()
@commands.has_guild_permissions(manage_channels=True)
@commands.bot_has_guild_permissions(manage_channels=True)
async def lock(ctx):
    await ctx.channel.set_permissions(ctx.guild.default_role, send_messages=False)
    await ctx.send('**An admin/moderator has locked this channel. Please wait for an admin to unlock this channel with `+unlock`.**')
    print(f'{ctx.author} locked channel {ctx.channel}')

@bot.command()
@commands.guild_only()
@commands.has_guild_permissions(manage_channels=True)
@commands.bot_has_guild_permissions(manage_channels=True)
async def unlock(ctx):
    await ctx.channel.set_permissions(ctx.guild.default_role, send_messages=True)
    await ctx.send('**An admin/moderator has unlocked this channel with `unlock`.**')
    print(f'{ctx.author} unlocked channel {ctx.channel}.')

keep_alive()
bot.run(os.getenv('TOKEN'))

有人能帮我吗

重申问题：我需要一个像“农民角色”这样的角色不能说话，而且当一个管理员说话时，@everyone角色仍然可以在那个频道说话

谢谢大家：）
使用和如下：

await ctx.channel.set_permissions(discord.utils.get(ctx.guild.members, name='Foo'), send_messages=False)

discord.utils.get（ctx.guild.members，name='Foo'）
按名称获取discord角色