如何根据胜负平设置Discord Embed消息的颜色？

我在开发Discord机器人的石头剪刀布命令，需求是：

• 失败时Embed颜色设为红色
• 胜利时设为绿色
• 平局时设为灰色

但目前代码无法正确设置结果Embed的颜色，附上我的实现代码：

@bot.command()
async def rps(ctx):
  options = ["rock", "paper", "scissors", "r", "p", "s"]
  ask_rps_em = discord.Embed(title="Rock, Paper or Scissors?", color=discord.Color.blue())
  await ctx.send(embed=ask_rps_em)
  def check(m):
    return m.author == ctx.author and m.channel == ctx.channel and m.content.lower() in options
  try:
    choice = (await bot.wait_for('message', check=check, timeout=30.0)).content
  except asyncio.TimeoutError:
    await ctx.send("You didn't answer in time. Please try again.")
  if choice.lower() not in options:
    await ctx.send("Invalid choice. Please choose rock, paper, or scissors.")
    return
  bot_choice = random.choice(options)
  result = None
  if choice.lower() == "rock":
    if bot_choice == "rock":
      result = "It's a tie!"
      color = "cyan"
    elif bot_choice == "paper":
      result = "You lose! Paper beats rock."
      color = "red"
    elif bot_choice == "scissors":
      result = "You win! Rock beats scissors."
      color = "green"
  elif choice.lower() == "paper":
    if bot_choice == "rock":
      result = "You win! Paper beats rock."
      color = "green"
    elif bot_choice == "paper":
      result = "It's a tie!"
      color = "cyan"
    elif bot_choice == "scissors":
      result = "You lose! Scissors beats paper."
      color = "red"
  elif choice.lower() == "scissors":
    if bot_choice == "rock":
      result = "You lose! Rock beats scissors."
      color = "red"
    elif bot_choice == "paper":
      result = "You win! Scissors beats paper."
      color = "green"
    elif bot_choice == "scissors":
      result = "It's a tie!"
      color = "cyan"
  result_em = discord.Embed(title=f"You chose {choice.lower()}. I chose {bot_choice}. {result}", color=discord.Color.{color}()) # should it be like that or what?
  await ctx.send(embed=result_em)

注：我需要将平局时的颜色改为灰色，且正确设置结果Embed的颜色。

问题分析与修复步骤 #

1. 颜色调用语法错误：Python不支持discord.Color.{color}()这种字符串拼接式的方法调用，需直接使用discord.Color提供的颜色属性。
2. 选项显示不友好：当前代码允许选择缩写（r/p/s），但结果直接显示缩写会影响体验，需映射成全名。
3. 平局颜色未达标：原代码使用cyan，需替换为灰色系的discord.Color.grey()或discord.Color.dark_grey()。
4. 冗余逻辑简化：原胜负判断代码重复度高，可合并为更简洁的条件判断。

修改后的完整代码 #

import discord
import asyncio
import random
from discord.ext import commands

@bot.command()
async def rps(ctx):
    # 建立缩写与全名的映射关系
    option_map = {
        "r": "rock",
        "p": "paper",
        "s": "scissors",
        "rock": "rock",
        "paper": "paper",
        "scissors": "scissors"
    }
    valid_options = list(option_map.keys())
    
    # 发送选择提示
    ask_embed = discord.Embed(title="Rock, Paper or Scissors?", color=discord.Color.blue())
    await ctx.send(embed=ask_embed)
    
    # 消息检查器
    def check_message(m):
        return m.author == ctx.author and m.channel == ctx.channel and m.content.lower() in valid_options
    
    try:
        user_input = (await bot.wait_for('message', check=check_message, timeout=30.0)).content.lower()
    except asyncio.TimeoutError:
        await ctx.send("You didn't answer in time. Please try again.")
        return  # 超时后终止流程
    
    # 转换为全名
    user_choice = option_map[user_input]
    bot_input = random.choice(valid_options)
    bot_choice = option_map[bot_input]
    
    # 初始化结果与颜色
    result_text = ""
    embed_color = discord.Color.grey()  # 默认平局颜色
    
    # 判断胜负
    if user_choice == bot_choice:
        result_text = "It's a tie!"
    elif (user_choice == "rock" and bot_choice == "scissors") or \
         (user_choice == "paper" and bot_choice == "rock") or \
         (user_choice == "scissors" and bot_choice == "paper"):
        result_text = f"You win! {user_choice.capitalize()} beats {bot_choice}."
        embed_color = discord.Color.green()
    else:
        result_text = f"You lose! {bot_choice.capitalize()} beats {user_choice}."
        embed_color = discord.Color.red()
    
    # 发送结果Embed
    result_embed = discord.Embed(
        title=f"You chose {user_choice}. I chose {bot_choice}. {result_text}",
        color=embed_color
    )
    await ctx.send(embed=result_embed)

关键修改说明 #

• 选项映射：通过option_map统一处理缩写与全名的转换，确保结果显示清晰。
• 颜色赋值：直接调用discord.Color的内置颜色方法（green()/red()/grey()），避免语法错误。
• 逻辑简化：用组合条件判断胜负，减少冗余代码，提升可读性。
• 流程优化：超时后添加return，避免后续代码无意义执行。

内容的提问来源于stack exchange，提问作者user19932233