60 lines
2.1 KiB
Python
60 lines
2.1 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.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, kwargs={'freqtrade': freqtrade,
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'config': config})
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def _load_pairlist(
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self, pairlist_name: str, 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 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 = [
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current_path.parent.parent.joinpath('user_data/pairlist'),
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current_path,
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]
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for _path in abs_paths:
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try:
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pairlist = self._search_object(directory=_path, object_type=IPairList,
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object_name=pairlist_name,
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kwargs=kwargs)
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if pairlist:
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logger.info("Using resolved pairlist %s from '%s'", pairlist_name, _path)
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return pairlist
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except FileNotFoundError:
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logger.warning('Path "%s" does not exist', _path.relative_to(Path.cwd()))
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raise ImportError(
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"Impossible to load Pairlist '{}'. This class does not exist"
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" or contains Python code errors".format(pairlist_name)
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)
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