如何在discord.py中获取和编辑嵌入？

import discord

client = discord.Client()

@client.event
async def on_message(message):
    if message.content.startswith('!edit_embed'):
        # 获取嵌入
        embed = discord.Embed(title="示例嵌入", description="这是一个示例嵌入", color=discord.Color.blue())
        embed.add_field(name="字段1", value="值1")
        embed.add_field(name="字段2", value="值2")
        
        # 发送嵌入
        embed_message = await message.channel.send(embed=embed)
        
        # 编辑嵌入
        new_embed = discord.Embed(title="更新后的示例嵌入", description="这是更新后的示例嵌入", color=discord.Color.green())
        new_embed.add_field(name="更新字段", value="更新值")
        await embed_message.edit(embed=new_embed)

client.run('YOUR_BOT_TOKEN')