Parse ccxt ohlcv history into dict in get_ticker_history

freqtrade/tests/testdata/download_backtest_data.py

@@ -4,7 +4,6 @@
 import sys
 import json
 import ccxt
-import datetime
 
 from freqtrade import exchange
 from freqtrade import misc
@@ -37,18 +36,5 @@ for pair in PAIRS:
         data = exchange.get_ticker_history(pair, tick_interval)
         pair_print = pair.replace('/', '_')
         filename = '{}-{}.json'.format(pair_print, tick_interval)
-
-        data_json = []
-        for candlestick in data:
-            # Timestamp in unix milliseconds formatted
-            data_json.append({
-                'T': datetime.datetime.fromtimestamp(candlestick[0]/1000.0).strftime('%Y-%m-%dT%H:%M:%S.%f'),
-                'O': candlestick[1],
-                'H': candlestick[2],
-                'L': candlestick[3],
-                'C': candlestick[4],
-                'V': candlestick[5],
-            })
-        data_json = sorted(data_json, key=lambda d: d['T'])
-
-        misc.file_dump_json(filename, data_json)
+        data = sorted(data, key=lambda d: d['T'])
+        misc.file_dump_json(filename, data)