使用discord.py -pixabay错误的python otter命令

import discord
import requests

client = discord.Client()

@client.event
async def on_ready():
    print('Bot is ready')

@client.event
async def on_message(message):
    if message.content.startswith('-pixabay'):
        query = message.content.split('-pixabay')[1].strip()
        response = requests.get(f'https://pixabay.com/api/?key=YOUR_API_KEY&q={query}&image_type=photo')
        data = response.json()
        
        if data['totalHits'] > 0:
            image_url = data['hits'][0]['largeImageURL']
            await message.channel.send(image_url)
        else:
            await message.channel.send('No images found')

client.run('YOUR_DISCORD_BOT_TOKEN')