如何在discord.py中将带有枕头的图像裁剪为圆形？

问题描述

所以我试图做出一个“想要的”命令，我的机器人将用户的头像放置在想要的海报上。我能够使命令正常工作，但是尝试将其头像裁剪为圆形时遇到了一些麻烦。这是我的代码：

@bot.command(aliases=['Wanted'])
async def wanted(ctx,*,user: discord.Member = None):
  async with ctx.typing():
    if user == None:
        user = ctx.author

    wanted = Image.open("wanted.png")
    
    asset = user.avatar_url_as(size=128)

    data = BytesIO(await asset.read())
    pfp = Image.open(data)
    bigsize = (asset.size[0] * 3,asset.size[1] * 3)
    mask = Image.new('L',bigsize,0)
    draw = ImageDraw.Draw(mask) 
    draw.ellipse((0,0) + bigsize,fill=255)
    mask = mask.resize(asset.size,Image.ANTIALIAS)
    asset.putalpha(mask)

    pfp = pfp.resize((682,682))
    output = ImageOps.fit(asset,mask.size,centering=(0.5,0.5))

    output.putalpha(mask)
    
    wanted.paste(pfp,(280,480))

    wanted.save("profile.png")

    await ctx.send(file=discord.File("profile.png"))

这是我遇到的错误：

Traceback (most recent call last):
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/bot.py",line 903,in invoke
    await ctx.command.invoke(ctx)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py",line 855,in invoke
    await injected(*ctx.args,**ctx.kwargs)
  File "/opt/virtualenvs/python3/lib/python3.8/site-packages/discord/ext/commands/core.py",line 94,in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: AttributeError: 'Asset' object has no attribute 'size'```

解决方法

抱怨是因为Discord Asset对象没有属性size according to the docs。

您要使用的是PIL Image object，它具有您要寻找的size属性。这可以通过稍微更改代码来完成：

asset = user.avatar_url_as(size=128)

data = BytesIO(await asset.read())
pfp = Image.open(data)
# Instead of using asset.size,we use pfp.size.  pfp is a PIL Image object
# that has the size attribute.
bigsize = (pfp.size[0] * 3,pfp.size[1] * 3)