discord.py中随机发送6个骰子Embed失败问题求助

问题说明 #

尝试实现Discord机器人随机发送6个带骰子图片的discord.Embed，但代码运行时报错：字符串没有to_dict属性。原代码如下：

embed1 = discord.Embed()
embed1.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/28e8fc51f2e2945fd7cd6b3a158ab7115993a1be3328e656713f01107282c4cc.png')

embed2 = discord.Embed()
embed2.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/a2daafe7bb4b6fd9aef54aa313d7e19b5beae28a2dbcba4d3dacc9be8b2ffcee.png')

embed3 = discord.Embed()
embed3.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/04fd25da832cb85af325ab32e714642bef78c97a0858062bb0b15a168f1e185f.jpeg')

embed4 = discord.Embed()
embed4.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/b26214af7789cf5bd239f862485e10910fe4cb167437338c12abdbb374f4f683.png')

embed5 = discord.Embed()
embed5.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/64472c33b4a99025e133e9d063128e08b468abb58ab8b8d8fa3d8b57d7da52bc.png')

embed6 = discord.Embed()
embed6.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/183014dc016ae2658314b25d8f2ad5a442aea04999b2457c66381a9e651c4c82.png')

embeds = [f'{embed1}', f'{embed2}', f'{embed3}', f'{embed4}', f'{embed5}', f'{embed6}']

@client.command()
async def dados(ctx): 
    await ctx.send(embed={random.choice(embeds)})

错误原因 #

1. Embed对象被转为字符串：使用f'{embed1}'将discord.Embed实例强制转为字符串，导致embeds列表中存储的是字符串而非Embed对象。但ctx.send()的embed参数要求传入discord.Embed实例，字符串没有Discord序列化所需的to_dict()方法，因此触发报错。
2. 语法错误的大括号：await ctx.send(embed={random.choice(embeds)})中的大括号属于错误语法，会把选中的内容包裹成集合，而非直接传递Embed对象。

修复后的代码 #

方案一：直接存储Embed对象 #

import random
import discord
from discord.ext import commands

client = commands.Bot(command_prefix='!')  # 根据你的机器人前缀修改

# 创建Embed对象列表，直接存储实例而非字符串
embed1 = discord.Embed()
embed1.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/28e8fc51f2e2945fd7cd6b3a158ab7115993a1be3328e656713f01107282c4cc.png')

embed2 = discord.Embed()
embed2.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/a2daafe7bb4b6fd9aef54aa313d7e19b5beae28a2dbcba4d3dacc9be8b2ffcee.png')

embed3 = discord.Embed()
embed3.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/04fd25da832cb85af325ab32e714642bef78c97a0858062bb0b15a168f1e185f.jpeg')

embed4 = discord.Embed()
embed4.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/b26214af7789cf5bd239f862485e10910fe4cb167437338c12abdbb374f4f683.png')

embed5 = discord.Embed()
embed5.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/64472c33b4a99025e133e9d063128e08b468abb58ab8b8d8fa3d8b57d7da52bc.png')

embed6 = discord.Embed()
embed6.set_image(url='https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/183014dc016ae2658314b25d8f2ad5a442aea04999b2457c66381a9e651c4c82.png')

embeds = [embed1, embed2, embed3, embed4, embed5, embed6]

@client.command()
async def dados(ctx): 
    await ctx.send(embed=random.choice(embeds))

方案二：简化代码，动态创建Embed #

如果不想重复创建Embed对象，可以先存储所有骰子图片的URL，随机选中后再生成Embed：

import random
import discord
from discord.ext import commands

client = commands.Bot(command_prefix='!')

# 存储所有骰子图片URL
dice_image_urls = [
    'https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/28e8fc51f2e2945fd7cd6b3a158ab7115993a1be3328e656713f01107282c4cc.png',
    'https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/a2daafe7bb4b6fd9aef54aa313d7e19b5beae28a2dbcba4d3dacc9be8b2ffcee.png',
    'https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/04fd25da832cb85af325ab32e714642bef78c97a0858062bb0b15a168f1e185f.jpeg',
    'https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/b26214af7789cf5bd239f862485e10910fe4cb167437338c12abdbb374f4f683.png',
    'https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/64472c33b4a99025e133e9d063128e08b468abb58ab8b8d8fa3d8b57d7da52bc.png',
    'https://cdn-longterm.mee6.xyz/plugins/commands/images/551250166196207634/183014dc016ae2658314b25d8f2ad5a442aea04999b2457c66381a9e651c4c82.png'
]

@client.command()
async def dados(ctx):
    selected_url = random.choice(dice_image_urls)
    embed = discord.Embed()
    embed.set_image(url=selected_url)
    await ctx.send(embed=embed)

内容的提问来源于stack exchange，提问作者Aby