如何在python上使用Binance API创建购买订单，使用我选择的所有硬币，而不是设置我想要购买的硬币的数量？

import requests
import hashlib
import hmac
import time

api_key = 'YOUR_API_KEY'
api_secret = 'YOUR_API_SECRET'
base_url = 'https://api.binance.com'
symbol = 'YOUR_SYMBOL'  # 例如：BTCUSDT
quote_asset = 'YOUR_QUOTE_ASSET'  # 例如：USDT

def create_buy_order(quantity):
    endpoint = '/api/v3/order'
    timestamp = int(time.time() * 1000)
    params = {
        'symbol': symbol,
        'side': 'BUY',
        'type': 'MARKET',
        'quoteOrderQty': quantity,
        'timestamp': timestamp,
        'recvWindow': 5000
    }
    query_string = '&'.join([f'{k}={v}' for k, v in params.items()])
    signature = hmac.new(api_secret.encode(), query_string.encode(), hashlib.sha256).hexdigest()
    headers = {
        'X-MBX-APIKEY': api_key
    }
    url = f'{base_url}{endpoint}?{query_string}&signature={signature}'
    response = requests.post(url, headers=headers)
    return response.json()

quantity = 'YOUR_QUANTITY'  # 设置购买的总金额
response = create_buy_order(quantity)
print(response)