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get_pair_dataframe helper method added

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This commit is contained in:
hroff-1902 2019-08-17 11:43:36 +03:00
parent 161db08745
commit 84a0f9ea42
1 changed files with 30 additions and 16 deletions
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44
freqtrade/data/dataprovider.py
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@ -44,36 +44,50 @@ class DataProvider():
def ohlcv(self, pair: str, ticker_interval: str = None, copy: bool = True) -> DataFrame:
"""
get ohlcv data for the given pair as DataFrame
Please check `available_pairs` to verify which pairs are currently cached.
Get ohlcv data for the given pair as DataFrame
Please check `self.available_pairs` to verify which pairs are currently cached.
:param pair: pair to get the data for
:param ticker_interval: ticker_interval to get pair for
:param copy: copy dataframe before returning.
Use false only for RO operations (where the dataframe is not modified)
:param ticker_interval: ticker interval to get data for
:param copy: copy dataframe before returning if True.
Use False only for read-only operations (where the dataframe is not modified)
"""
if self.runmode in (RunMode.DRY_RUN, RunMode.LIVE):
if ticker_interval:
pairtick = (pair, ticker_interval)
else:
pairtick = (pair, self._config['ticker_interval'])
pairtick = (pair, ticker_interval or self._config['ticker_interval'])
if pairtick in self.available_pairs:
return self._exchange.klines(pairtick, copy=copy)
else:
return DataFrame()
def historic_ohlcv(self, pair: str, ticker_interval: str) -> DataFrame:
def historic_ohlcv(self, pair: str, ticker_interval: str = None) -> DataFrame:
"""
get stored historic ohlcv data
Get stored historic ohlcv data
:param pair: pair to get the data for
:param ticker_interval: ticker_interval to get pair for
:param ticker_interval: ticker interval to get data for
"""
return load_pair_history(pair=pair,
ticker_interval=ticker_interval,
ticker_interval=ticker_interval or self._config['ticker_interval'],
refresh_pairs=False,
datadir=Path(self._config['datadir']) if self._config.get(
'datadir') else None
)
def get_pair_dataframe(self, pair: str, ticker_interval: str = None) -> DataFrame:
"""
Return pair ohlcv data, either live or cached historical -- depending
on the runmode.
:param pair: pair to get the data for
:param ticker_interval: ticker interval to get data for
"""
if self.runmode in (RunMode.DRY_RUN, RunMode.LIVE):
# Get live ohlcv data.
data = self.ohlcv(pair=pair, ticker_interval=ticker_interval)
else:
# Get historic ohlcv data (cached on disk).
data = self.historic_ohlcv(pair=pair, ticker_interval=ticker_interval)
if len(data) == 0:
logger.warning(f"No data found for pair {pair}")
return data
def ticker(self, pair: str):
"""
Return last ticker data