Add poller functions in Python for all exchanges

api.py

+import requests
+
+class APIError(RuntimeError):
+    pass
+
+def get_check_status(errstr, url, *args):
+    r = requests.get(url, timeout=10.0, *args)
+    if r.status_code != 200:
+        raise APIError(errstr)
+    return r.json()
+
+def poll_btce():
+    url = 'https://btc-e.com/api/3/ticker/btc_usd'
+    return float(get_check_status('BTC-e', url)['btc_usd']['last']), 'USD'
+
+def poll_coinbase():
+    url = 'https://api.gdax.com/products/BTC-USD/ticker'
+    return float(get_check_status('Coinbase', url)['price']), 'USD'
+
+def poll_bitstamp():
+    url = 'https://www.bitstamp.net/api/v2/ticker/btcusd/'
+    return float(get_check_status('Bitstamp', url)['last']), 'USD'
+
+def poll_bitfinex():
+    url = 'https://api.bitfinex.com/v1/pubticker/btcusd'
+    return float(get_check_status('Bitfinex', url)['last_price']), 'USD'
+
+def poll_btcchina():
+    url = 'https://data.btcchina.com/data/ticker?market=btccny'
+    return float(get_check_status('BTCChina', url)['ticker']['last']), 'CNY'
+
+def poll_huobi():
+    url = 'http://api.huobi.com/staticmarket/ticker_btc_json.js'
+    return float(get_check_status('Huobi', url)['ticker']['last']), 'CNY'
+
+def poll_okcoin():
+    url = 'https://www.okcoin.com/api/v1/ticker.do?symbol=btc_usd'
+    return float(get_check_status('OKcoin', url)['ticker']['last']), 'CNY'
+
+def poll_kraken():
+    url = 'https://api.kraken.com/0/public/Ticker?pair=XXBTZEUR'
+    return float(get_check_status('Kraken', url)['result']['XXBTZEUR']['c'][0]), 'EUR'
+
+def poll_coinmarketcap():
+    url = 'https://api.coinmarketcap.com/v1/ticker/bitcoin'
+    return get_check_status('Coinmarketcap', url)[0]['market_cap_usd'], 'USD'
+
+if __name__ == '__main__':
+    print 'btc-e', poll_btce()
+    print 'coinbase', poll_coinbase()
+    print 'bitstamp', poll_bitstamp()
+    print 'bitfinex', poll_bitfinex()
+    print 'btcchina', poll_btcchina()
+    print 'huobi', poll_huobi()
+    print 'okcoin', poll_okcoin()
+    print 'kraken', poll_kraken()
+    print 'coinmarketcap', poll_coinmarketcap()