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Convert PairlistResolver to static loader

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This commit is contained in:
Matthias 2019-12-23 09:56:12 +01:00
parent 1c5f8070e5
commit 5fefa9e97c
3 changed files with 34 additions and 25 deletions
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4
freqtrade/pairlist/pairlistmanager.py
View File

@ -28,13 +28,13 @@ class PairListManager():
if 'method' not in pl:
logger.warning(f"No method in {pl}")
continue
pairl = PairListResolver(pl.get('method'),
pairl = PairListResolver.load_pairlist(pl.get('method'),
exchange=exchange,
pairlistmanager=self,
config=config,
pairlistconfig=pl,
pairlist_pos=len(self._pairlists)
).pairlist
)
self._tickers_needed = pairl.needstickers or self._tickers_needed
self._pairlists.append(pairl)

29
freqtrade/resolvers/pairlist_resolver.py
View File

@ -18,23 +18,32 @@ class PairListResolver(IResolver):
This class contains all the logic to load custom PairList class
"""
__slots__ = ['pairlist']
__slots__ = []
def __init__(self, pairlist_name: str, exchange, pairlistmanager,
config: dict, pairlistconfig: dict, pairlist_pos: int) -> None:
@staticmethod
def load_pairlist(pairlist_name: str, exchange, pairlistmanager,
config: dict, pairlistconfig: dict, pairlist_pos: int) -> IPairList:
"""
Load the custom class from config parameter
:param config: configuration dictionary or None
Load the pairlist with pairlist_name
:param pairlist_name: Classname of the pairlist
:param exchange: Initialized exchange class
:param pairlistmanager: Initialized pairlist manager
:param config: configuration dictionary
:param pairlistconfig: Configuration dedicated to this pairlist
:param pairlist_pos: Position of the pairlist in the list of pairlists
:return: initialized Pairlist class
"""
self.pairlist = self._load_pairlist(pairlist_name, config,
return PairListResolver._load_pairlist(pairlist_name, config,
kwargs={'exchange': exchange,
'pairlistmanager': pairlistmanager,
'config': config,
'pairlistconfig': pairlistconfig,
'pairlist_pos': pairlist_pos})
def _load_pairlist(
self, pairlist_name: str, config: dict, kwargs: dict) -> IPairList:
@staticmethod
def _load_pairlist(pairlist_name: str, config: dict, kwargs: dict) -> IPairList:
"""
Search and loads the specified pairlist.
:param pairlist_name: name of the module to import
@ -44,10 +53,10 @@ class PairListResolver(IResolver):
"""
current_path = Path(__file__).parent.parent.joinpath('pairlist').resolve()
abs_paths = self.build_search_paths(config, current_path=current_path,
abs_paths = IResolver.build_search_paths(config, current_path=current_path,
user_subdir=None, extra_dir=None)
pairlist = self._load_object(paths=abs_paths, object_type=IPairList,
pairlist = IResolver._load_object(paths=abs_paths, object_type=IPairList,
object_name=pairlist_name, kwargs=kwargs)
if pairlist:
return pairlist

2
tests/pairlist/test_pairlist.py
View File

@ -53,7 +53,7 @@ def test_load_pairlist_noexist(mocker, markets, default_conf):
with pytest.raises(OperationalException,
match=r"Impossible to load Pairlist 'NonexistingPairList'. "
r"This class does not exist or contains Python code errors."):
PairListResolver('NonexistingPairList', bot.exchange, plm, default_conf, {}, 1)
PairListResolver.load_pairlist('NonexistingPairList', bot.exchange, plm, default_conf, {}, 1)
def test_refresh_market_pair_not_in_whitelist(mocker, markets, static_pl_conf):