examples: adds trades/candles example

bfxapi/examples/subscribe_trades_candles.py

@@ -0,0 +1,34 @@
+import os
+import sys
+sys.path.append('../')
+
+from bfxapi.websockets.LiveWebsocket import LiveBfxWebsocket
+
+'''
+This script requires you to run an instance of the bfx-hf-data-server on 
+port 8899. For more info on how to setup the data-server please visit:
+https://github.com/bitfinexcom/bfx-hf-data-server
+'''
+
+ws = LiveBfxWebsocket(
+  logLevel='INFO'
+)
+
+@ws.on('error')
+def log_error(err):
+  print ("Error: {}".format(err))
+
+@ws.on('new_candle')
+def log_candle(candle):
+  print ("New candle: {}".format(candle))
+
+@ws.on('new_trade')
+def log_trade(trade):
+  print ("New trade: {}".format(trade))
+
+def start():
+  ws.subscribe('candles', 'tBTCUSD', timeframe='1m')
+  ws.subscribe('trades', 'tBTCUSD')
+
+ws.on('connected', start)
+ws.run()