def download_data(self, pair, start, end):
"""Download trade data and store as .csv file.
Args:
pair (str): Currency pair.
start (int): Start UNIX of trade data to download.
end (int): End UNIX of trade data to download.
"""
dataio = DataIO(savedir=self._savedir, fieldnames=self.FIELDNAMES)
if dataio.csv_check(pair):
newest_t = float(dataio.csv_get_last(pair)['time'])
else:
newest_t = self.__find_start_trade_time(pair, start)
while newest_t < end:
# old -> new
r = self.__get_slice(pair, newest_t + 1e-4)
# list to dict
r = self.__to_dict(r)
# save to file
dataio.csv_append(pair, r)
# break condition
if len(r) < self.__MAX_LIMIT:
break
# prepare next iteration
newest_t = float(r[-1]['time'])
print('Kraken\t| {} : {}'.format(timeutil.unix_to_iso(newest_t),
pair))
print('Kraken\t| Download complete : {}'.format(pair))
def download_data(self, pair, start, end):
"""Download trade data and store as .csv file.
Args:
pair (str): Currency pair.
start (int): Start UNIX of trade data to download.
end (int): End UNIX of trade data to download.
"""
dataio = DataIO(savedir=self._savedir, fieldnames=self.FIELDNAMES)
if dataio.csv_check(pair):
last_row = dataio.csv_get_last(pair)
newest_id = int(last_row['trade_id']) + 1
newest_t = int(last_row['time'])
else:
newest_id = self.__find_start_trade_id(pair, start)
newest_t = 0
while newest_t < end:
# new -> old
r = self.__get_slice(pair, newest_id)
# old -> new, add unix timestamp
new_r = []
for row in r:
row['time'] = row['T'] // 1000
row['date'] = timeutil.unix_to_iso(row['time'])
row['price'] = row['p']
row['size'] = row['q']
row['side'] = 'sell' if row['m'] == True else 'buy'
row['best_price_match'] = row['M']
row['trade_id'] = row['a']
row.pop('a', None)
row.pop('p', None)
row.pop('q', None)
row.pop('f', None)
row.pop('l', None)
row.pop('T', None)
row.pop('m', None)
row.pop('M', None)
new_r.append(row)
# save to file
dataio.csv_append(pair, new_r)
# break condition
if len(r) < self.__MAX_LIMIT:
break
# prepare next iteration
newest_id = new_r[-1]['trade_id'] + 1
newest_t = new_r[-1]['time']
print('Binance\t| {} : {}'.format(timeutil.unix_to_iso(newest_t),
pair))
print('Binance\t| Download complete : {}'.format(pair))
def download_data(self, pair, start, end):
"""Download trade data and store as .csv file.
Args:
pair (str): Currency pair.
start (int): Start UNIX of trade data to download.
end (int): End UNIX of trade data to download.
"""
dataio = DataIO(savedir=self._savedir, fieldnames=self.FIELDNAMES)
if dataio.csv_check(pair):
last_row = dataio.csv_get_last(pair)
newest_id = int(last_row['trade_id']) + 1
newest_t = int(last_row['time'])
else:
newest_id = self.__find_start_trade_id(pair, start)
newest_t = 0
last_trade_id = self.__find_last_trade_id(pair)
while newest_t < end:
# new -> old
r = self.__get_slice(pair, newest_id + self.__MAX_LIMIT)
# break condition
to_break = False
# old -> new, add unix timestamp
new_r = []
for row in reversed(r):
if row['trade_id'] > newest_id:
row['date'] = row['time']
row['time'] = timeutil.iso_to_unix(row['time'])
new_r.append(row)
if row['trade_id'] == last_trade_id:
to_break = True
# save to file
dataio.csv_append(pair, new_r)
# break condition
if to_break:
break
# prepare next iteration
newest_id = new_r[-1]['trade_id']
newest_t = new_r[-1]['time']
print('GDAX\t| {} : {}'.format(timeutil.unix_to_iso(newest_t),
pair))
print('GDAX\t| Download complete : {}'.format(pair))
def download_data(self, pair, start, end):
"""Download trade data and store as .csv file.
Args:
pair (str): Currency pair.
start (int): Start UNIX of trade data to download.
end (int): End UNIX of trade data to download.
"""
dataio = DataIO(savedir=self._savedir, fieldnames=self.FIELDNAMES)
if dataio.csv_check(pair):
last_row = dataio.csv_get_last(pair)
newest_id = int(last_row['trade_id']) + 1
newest_t = int(last_row['time'])
else:
newest_id = self.__find_start_trade_id(pair, start)
newest_t = 0
while newest_t < end:
# new -> old
r = self.__get_slice(pair, newest_id)
# old -> new, add unix timestamp
new_r = []
for i, row in enumerate(r):
row['time'] = timeutil.iso_to_unix(row['timestamp'])
row['date'] = row['timestamp']
row['trade_id'] = newest_id + i
row['side'] = row['side'].lower()
row.pop('timestamp', None)
row.pop('symbol', None)
new_r.append(row)
# save to file
dataio.csv_append(pair, new_r)
# break condition
if len(r) < self.__MAX_LIMIT:
break
# prepare next iteration
newest_id = new_r[-1]['trade_id'] + 1
newest_t = new_r[-1]['time']
print('Bitmex\t| {} : {}'.format(
timeutil.unix_to_iso(newest_t), pair))
print('Bitmex\t| Download complete : {}'.format(pair))
def download_data(self, pair, start, end):
"""Download trade data and store as .csv file.
Args:
pair (str): Currency pair.
start (int): Start UNIX of trade data to download.
end (int): End UNIX of trade data to download.
"""
dataio = DataIO(savedir=self._savedir, fieldnames=self.FIELDNAMES)
last_row = None
if dataio.csv_check(pair):
last_row = dataio.csv_get_last(pair)
newest_t = int(last_row['time'])
else:
newest_t = self.__find_start_trade_time(pair, start) - 1
# break condition
last_trade_time = self.__find_last_trade_time(pair)
while newest_t < end:
# new -> old
r = self.__get_slice(pair, newest_t)
# old -> new; remove duplicate data by trade ID
new_r = []
for row in reversed(r):
if last_row is not None:
if int(last_row['tradeID']) >= row['tradeID']:
continue # remove duplicates
last_row = row
row['time'] = timeutil.iso_to_unix(row['date'])
new_r.append(row)
if newest_t > last_trade_time:
break
# save to file
dataio.csv_append(pair, new_r)
# prepare next iteration
newest_t += self.__MAX_RANGE
print('Poloniex| {} : {}'.format(
timeutil.unix_to_iso(newest_t), pair))
print('Poloniex| Download complete : {}'.format(pair))
