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docs/ccxt/wiki/examples/py/async-instantiate-all-at-once.md

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+- [Async Instantiate All At Once](./examples/py/)
+
+
+ ```python
+ # -*- coding: utf-8 -*-
+
+import os
+import sys
+import asyncio
+
+
+import ccxt.async_support as ccxt  # noqa: E402
+
+exchanges = {}  # a placeholder for your instances
+
+
+async def main():
+    for id in ccxt.exchanges:
+        exchange = getattr(ccxt, id)
+        exchanges[id] = exchange()
+    # now exchanges dictionary contains all exchange instances...
+    print(await exchanges['bittrex'].fetch_order_book('ETH/BTC'))
+    # close the aiohttp session object
+    for id in exchanges:
+        await exchanges[id].close()
+
+asyncio.run(main())
+ 
+```