Merge remote-tracking branch 'upstream/develop' into pairlists-shuffle

freqtrade/pairlist/VolumePairList.py

@@ -25,7 +25,7 @@ class VolumePairList(IPairList):
 
         if 'number_assets' not in self._pairlistconfig:
             raise OperationalException(
-                f'`number_assets` not specified. Please check your configuration '
+                '`number_assets` not specified. Please check your configuration '
                 'for "pairlist.config.number_assets"')
 
         self._stake_currency = config['stake_currency']

freqtrade/pairlist/pairlistmanager.py

@@ -10,6 +10,7 @@ from cachetools import TTLCache, cached
 from freqtrade.exceptions import OperationalException
 from freqtrade.pairlist.IPairList import IPairList
 from freqtrade.resolvers import PairListResolver
+from freqtrade.typing import ListPairsWithTimeframes
 
 
 logger = logging.getLogger(__name__)
@@ -107,3 +108,9 @@ class PairListManager():
                     pairlist.remove(p)
 
         return pairlist
+
+    def create_pair_list(self, pairs: List[str], timeframe: str = None) -> ListPairsWithTimeframes:
+        """
+        Create list of pair tuples with (pair, ticker_interval)
+        """
+        return [(pair, timeframe or self._config['ticker_interval']) for pair in pairs]