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46 lines
1.3 KiB
Python
46 lines
1.3 KiB
Python
import logging
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import sys
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from copy import deepcopy
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from freqtrade.strategy.interface import IStrategy
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# Import Default-Strategy to have hyperopt correctly resolve
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from freqtrade.strategy.default_strategy import DefaultStrategy # noqa: F401
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logger = logging.getLogger(__name__)
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def import_strategy(strategy: IStrategy, config: dict) -> IStrategy:
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"""
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Imports given Strategy instance to global scope
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of freqtrade.strategy and returns an instance of it
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"""
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# Copy all attributes from base class and class
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comb = {**strategy.__class__.__dict__, **strategy.__dict__}
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# Delete '_abc_impl' from dict as deepcopy fails on 3.7 with
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# `TypeError: can't pickle _abc_data objects``
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# This will only apply to python 3.7
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if sys.version_info.major == 3 and sys.version_info.minor == 7 and '_abc_impl' in comb:
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del comb['_abc_impl']
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attr = deepcopy(comb)
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# Adjust module name
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attr['__module__'] = 'freqtrade.strategy'
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name = strategy.__class__.__name__
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clazz = type(name, (IStrategy,), attr)
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logger.debug(
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'Imported strategy %s.%s as %s.%s',
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strategy.__module__, strategy.__class__.__name__,
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clazz.__module__, strategy.__class__.__name__,
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)
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# Modify global scope to declare class
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globals()[name] = clazz
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return clazz(config)
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