mirror of
https://github.com/freqtrade/freqtrade.git
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53 lines
1.9 KiB
Python
53 lines
1.9 KiB
Python
# pragma pylint: disable=attribute-defined-outside-init
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"""
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This module load custom hyperopts
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"""
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import logging
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from pathlib import Path
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from freqtrade import OperationalException
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from freqtrade.pairlist.IPairList import IPairList
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from freqtrade.resolvers import IResolver
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logger = logging.getLogger(__name__)
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class PairListResolver(IResolver):
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"""
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This class contains all the logic to load custom hyperopt class
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"""
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__slots__ = ['pairlist']
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def __init__(self, pairlist_name: str, freqtrade, config: dict) -> None:
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"""
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Load the custom class from config parameter
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:param config: configuration dictionary or None
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"""
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self.pairlist = self._load_pairlist(pairlist_name, config, kwargs={'freqtrade': freqtrade,
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'config': config})
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def _load_pairlist(
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self, pairlist_name: str, config: dict, kwargs: dict) -> IPairList:
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"""
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Search and loads the specified pairlist.
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:param pairlist_name: name of the module to import
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:param config: configuration dictionary
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:param extra_dir: additional directory to search for the given pairlist
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:return: PairList instance or None
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"""
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current_path = Path(__file__).parent.parent.joinpath('pairlist').resolve()
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abs_paths = self.build_search_paths(config, current_path=current_path,
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user_subdir='pairlist', extra_dir=None)
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pairlist = self._load_object(paths=abs_paths, object_type=IPairList,
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object_name=pairlist_name, kwargs=kwargs)
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if pairlist:
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return pairlist
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raise OperationalException(
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f"Impossible to load Pairlist '{pairlist_name}'. This class does not exist "
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"or contains Python code errors."
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)
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