added examples/py/fetch-ohlcv-kraken.py ccxt#110

examples/py/fetch-ohlcv-kraken.py

@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+
+import os
+import sys
+import asciichart
+
+# -----------------------------------------------------------------------------
+
+this_folder = os.path.dirname(os.path.abspath(__file__))
+root_folder = os.path.dirname(os.path.dirname(this_folder))
+sys.path.append(root_folder + '/python')
+sys.path.append(this_folder)
+
+# -----------------------------------------------------------------------------
+
+import ccxt  # noqa: E402
+
+# -----------------------------------------------------------------------------
+
+exchange = ccxt.kraken()
+symbol = 'LTC/EUR'
+
+# each ohlcv candle is a list of [ timestamp, open, high, low, close, volume ]
+index = 4  # use close price from each ohlcv candle
+
+length = 80
+height = 15
+
+
+def print_chart(exchange, symbol, timeframe):
+
+    print("\n" + exchange.name + ' ' + symbol + ' ' + timeframe + ' chart:')
+
+    # get a list of ohlcv candles
+    ohlcv = exchange.fetch_ohlcv(symbol, timeframe)
+
+    # get the ohlCv (closing price, index == 4)
+    series = [x[index] for x in ohlcv]
+
+    # print datetime and other values
+    for x in ohlcv:
+        print(exchange.iso8601(x[0]), x)
+
+    # print the chart
+    print("\n" + asciichart.plot(series[-length:], {'height': height}))  # print the chart
+
+    last = ohlcv[len(ohlcv) - 1][index]  # last closing price
+    return last
+
+
+last = print_chart(exchange, symbol, '1m')
+print("\n" + exchange.name + " ₿ = $" + str(last) + "\n")  # print last closing price