examples: creates send_order example

bfxapi/examples/send_order.py

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+import os
+import sys
+sys.path.append('../')
+
+from bfxapi.websockets.LiveWebsocket import LiveBfxWebsocket
+
+API_KEY=os.getenv("BFX_KEY")
+API_SECRET=os.getenv("BFX_SECRET")
+
+ws = LiveBfxWebsocket(
+  API_KEY=API_KEY,
+  API_SECRET=API_SECRET,
+  logLevel='INFO'
+)
+
+@ws.on('order_closed')
+def trade_completed(order, trade):
+  print ("Order filled.")
+  print (order)
+  print (trade)
+
+@ws.on('error')
+def log_error(msg):
+  print ("Error: {}".format(msg))
+
+@ws.on('authenticated')
+async def submit_order(auth_message):
+  await ws.submit_order('tBTCUSD', 0, 0.01, 'EXCHANGE MARKET')
+
+# If you dont want to use a decorator
+# ws.on('authenticated', submit_order)
+# ws.on('error', log_error)
+
+# You can also provide a callback
+# await ws.submit_order('tBTCUSD', 0, 0.01,
+# 'EXCHANGE MARKET', onComplete=trade_complete)
+
+ws.run()