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docs/ccxt/wiki/examples/py/async-binance-fetch-option-orderbook.md

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+- [Async Binance Fetch Option Orderbook](./examples/py/)
+
+
+ ```python
+ # -*- coding: utf-8 -*-
+# This example uses the implicit API, in the future we will have options unified which will make things easier.
+# You can check if the unified methods are ready-to-use (createOrder, fetchOrder etc) by checking: `is_unified = exchange.has['option']`
+
+import asyncio
+import os
+import sys
+from pprint import pprint
+
+
+import ccxt.async_support as ccxt  # noqa: E402
+
+
+async def main():
+    exchange = ccxt.binance({
+        'apiKey': 'YOUR_API_KEY',
+        'secret': 'YOUR_SECRET',
+        # 'verbose': True,  # for debug output
+    })
+    await exchange.load_markets()
+    market_id = 'ETH-221028-1500-C'
+    symbol = 'ETH/USDT:USDT-221028-1500-C'
+    limit = 10
+    try:
+        response = await exchange.fetch_order_book(symbol, limit)
+        # Implicit API:
+        # response = await exchange.eapiPublicGetDepth({
+        #     'symbol': market_id,
+        #     # 'limit': limit,  # optional
+        # })
+        pprint(response)
+    except Exception as e:
+        print('fetch_order_book() failed')
+        print(e)
+    await exchange.close()
+
+
+asyncio.run(main())
+ 
+```