使用Discord.py开发机器人遇UnboundLocalError报错求助

Let's break down why you're hitting that UnboundLocalError and fix it step by step:

The Root Cause #

Your code has two key issues that lead to the error:

• You tried to call embed.set_image() before ever creating a discord.Embed object and assigning it to the embed variable. Python has no idea what embed is at that point!
• When you did create the discord.Embed instance, you didn't assign it to the embed variable — so that object was just created and immediately discarded, leaving embed still undefined.

Corrected Code #

Here's the fixed version of your .hug command, with comments explaining the changes:

import random  # Make sure this is at the top of your file
import discord
from discord.ext import commands

@commands.command(name="hug")
async def hug(self, ctx):
    hugs = [
        'https://tenor.com/view/anime-neko-k-on-hug-friends-gif-13124779',
        'https://tenor.com/view/anime-hug-love-smile-gif-15942846',
        'https://tenor.com/view/toilet-bound-hanakokun-anime-anime-hug-gif-16831471',
        'https://tenor.com/view/neko-anime-hug-gif-10989534'
    ]
    hugsrandom = random.choice(hugs)
    
    # 1. First create the Embed object and assign it to 'embed'
    embed = discord.Embed(title=f"**Вы обняли@{ctx.message.author.id}** ")
    
    # 2. Then call set_image() on the existing embed (note the `url=` parameter)
    embed.set_image(url=hugsrandom)
    
    # 3. Send the properly initialized embed
    await ctx.send(embed=embed)

Key Fixes Explained #

• We first initialize the embed variable with a discord.Embed instance, setting the title correctly.
• The set_image() method requires a url keyword argument to specify the image link — your original code was missing this, which would have caused a second error once you fixed the first one.
• We removed the unnecessary parentheses around each URL in the hugs list (they don't break anything, but they're redundant).

Now your .hug command should work as expected, sending a random hug GIF in a nicely formatted embed!

内容的提问来源于stack exchange，提问作者Whitefin