562 lines
23 KiB
Python
562 lines
23 KiB
Python
# pragma pylint: disable=too-many-instance-attributes, pointless-string-statement
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"""
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This module contains the hyperopt logic
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"""
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import locale
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import logging
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import random
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import sys
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import warnings
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from collections import OrderedDict
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from operator import itemgetter
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from pathlib import Path
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from pprint import pprint
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from typing import Any, Dict, List, Optional
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import rapidjson
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from colorama import Fore, Style
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from colorama import init as colorama_init
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from joblib import (Parallel, cpu_count, delayed, dump, load,
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wrap_non_picklable_objects)
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from pandas import DataFrame
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from freqtrade.data.history import get_timerange, trim_dataframe
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from freqtrade.exceptions import OperationalException
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from freqtrade.misc import plural, round_dict
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from freqtrade.optimize.backtesting import Backtesting
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# Import IHyperOpt and IHyperOptLoss to allow unpickling classes from these modules
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from freqtrade.optimize.hyperopt_interface import IHyperOpt # noqa: F401
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from freqtrade.optimize.hyperopt_loss_interface import IHyperOptLoss # noqa: F401
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from freqtrade.resolvers.hyperopt_resolver import (HyperOptLossResolver,
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HyperOptResolver)
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# Suppress scikit-learn FutureWarnings from skopt
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with warnings.catch_warnings():
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warnings.filterwarnings("ignore", category=FutureWarning)
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from skopt import Optimizer
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from skopt.space import Dimension
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logger = logging.getLogger(__name__)
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INITIAL_POINTS = 30
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# Keep no more than 2*SKOPT_MODELS_MAX_NUM models
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# in the skopt models list
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SKOPT_MODELS_MAX_NUM = 10
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MAX_LOSS = 100000 # just a big enough number to be bad result in loss optimization
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class Hyperopt:
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"""
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Hyperopt class, this class contains all the logic to run a hyperopt simulation
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To run a backtest:
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hyperopt = Hyperopt(config)
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hyperopt.start()
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"""
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def __init__(self, config: Dict[str, Any]) -> None:
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self.config = config
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self.backtesting = Backtesting(self.config)
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self.custom_hyperopt = HyperOptResolver.load_hyperopt(self.config)
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self.custom_hyperoptloss = HyperOptLossResolver.load_hyperoptloss(self.config)
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self.calculate_loss = self.custom_hyperoptloss.hyperopt_loss_function
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self.trials_file = (self.config['user_data_dir'] /
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'hyperopt_results' / 'hyperopt_results.pickle')
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self.tickerdata_pickle = (self.config['user_data_dir'] /
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'hyperopt_results' / 'hyperopt_tickerdata.pkl')
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self.total_epochs = config.get('epochs', 0)
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self.current_best_loss = 100
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if not self.config.get('hyperopt_continue'):
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self.clean_hyperopt()
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else:
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logger.info("Continuing on previous hyperopt results.")
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self.num_trials_saved = 0
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# Previous evaluations
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self.trials: List = []
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# Populate functions here (hasattr is slow so should not be run during "regular" operations)
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if hasattr(self.custom_hyperopt, 'populate_indicators'):
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self.backtesting.strategy.advise_indicators = \
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self.custom_hyperopt.populate_indicators # type: ignore
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if hasattr(self.custom_hyperopt, 'populate_buy_trend'):
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self.backtesting.strategy.advise_buy = \
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self.custom_hyperopt.populate_buy_trend # type: ignore
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if hasattr(self.custom_hyperopt, 'populate_sell_trend'):
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self.backtesting.strategy.advise_sell = \
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self.custom_hyperopt.populate_sell_trend # type: ignore
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# Use max_open_trades for hyperopt as well, except --disable-max-market-positions is set
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if self.config.get('use_max_market_positions', True):
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self.max_open_trades = self.config['max_open_trades']
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else:
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logger.debug('Ignoring max_open_trades (--disable-max-market-positions was used) ...')
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self.max_open_trades = 0
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self.position_stacking = self.config.get('position_stacking', False)
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if self.has_space('sell'):
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# Make sure use_sell_signal is enabled
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if 'ask_strategy' not in self.config:
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self.config['ask_strategy'] = {}
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self.config['ask_strategy']['use_sell_signal'] = True
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self.print_all = self.config.get('print_all', False)
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self.print_colorized = self.config.get('print_colorized', False)
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self.print_json = self.config.get('print_json', False)
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@staticmethod
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def get_lock_filename(config: Dict[str, Any]) -> str:
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return str(config['user_data_dir'] / 'hyperopt.lock')
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def clean_hyperopt(self) -> None:
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"""
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Remove hyperopt pickle files to restart hyperopt.
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"""
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for f in [self.tickerdata_pickle, self.trials_file]:
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p = Path(f)
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if p.is_file():
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logger.info(f"Removing `{p}`.")
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p.unlink()
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def _get_params_dict(self, raw_params: List[Any]) -> Dict:
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dimensions: List[Dimension] = self.dimensions
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# Ensure the number of dimensions match
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# the number of parameters in the list.
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if len(raw_params) != len(dimensions):
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raise ValueError('Mismatch in number of search-space dimensions.')
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# Return a dict where the keys are the names of the dimensions
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# and the values are taken from the list of parameters.
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return {d.name: v for d, v in zip(dimensions, raw_params)}
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def save_trials(self, final: bool = False) -> None:
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"""
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Save hyperopt trials to file
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"""
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num_trials = len(self.trials)
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if num_trials > self.num_trials_saved:
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logger.info(f"Saving {num_trials} {plural(num_trials, 'epoch')}.")
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dump(self.trials, self.trials_file)
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self.num_trials_saved = num_trials
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if final:
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logger.info(f"{num_trials} {plural(num_trials, 'epoch')} "
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f"saved to '{self.trials_file}'.")
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@staticmethod
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def _read_trials(trials_file: Path) -> List:
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"""
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Read hyperopt trials file
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"""
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logger.info("Reading Trials from '%s'", trials_file)
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trials = load(trials_file)
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return trials
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def _get_params_details(self, params: Dict) -> Dict:
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"""
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Return the params for each space
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"""
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result: Dict = {}
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if self.has_space('buy'):
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result['buy'] = {p.name: params.get(p.name)
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for p in self.hyperopt_space('buy')}
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if self.has_space('sell'):
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result['sell'] = {p.name: params.get(p.name)
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for p in self.hyperopt_space('sell')}
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if self.has_space('roi'):
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result['roi'] = self.custom_hyperopt.generate_roi_table(params)
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if self.has_space('stoploss'):
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result['stoploss'] = {p.name: params.get(p.name)
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for p in self.hyperopt_space('stoploss')}
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if self.has_space('trailing'):
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result['trailing'] = self.custom_hyperopt.generate_trailing_params(params)
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return result
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@staticmethod
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def print_epoch_details(results, total_epochs: int, print_json: bool,
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no_header: bool = False, header_str: str = None) -> None:
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"""
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Display details of the hyperopt result
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"""
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params = results.get('params_details', {})
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# Default header string
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if header_str is None:
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header_str = "Best result"
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if not no_header:
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explanation_str = Hyperopt._format_explanation_string(results, total_epochs)
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print(f"\n{header_str}:\n\n{explanation_str}\n")
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if print_json:
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result_dict: Dict = {}
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for s in ['buy', 'sell', 'roi', 'stoploss', 'trailing']:
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Hyperopt._params_update_for_json(result_dict, params, s)
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print(rapidjson.dumps(result_dict, default=str, number_mode=rapidjson.NM_NATIVE))
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else:
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Hyperopt._params_pretty_print(params, 'buy', "Buy hyperspace params:")
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Hyperopt._params_pretty_print(params, 'sell', "Sell hyperspace params:")
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Hyperopt._params_pretty_print(params, 'roi', "ROI table:")
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Hyperopt._params_pretty_print(params, 'stoploss', "Stoploss:")
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Hyperopt._params_pretty_print(params, 'trailing', "Trailing stop:")
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@staticmethod
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def _params_update_for_json(result_dict, params, space: str) -> None:
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if space in params:
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space_params = Hyperopt._space_params(params, space)
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if space in ['buy', 'sell']:
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result_dict.setdefault('params', {}).update(space_params)
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elif space == 'roi':
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# Convert keys in min_roi dict to strings because
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# rapidjson cannot dump dicts with integer keys...
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# OrderedDict is used to keep the numeric order of the items
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# in the dict.
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result_dict['minimal_roi'] = OrderedDict(
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(str(k), v) for k, v in space_params.items()
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)
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else: # 'stoploss', 'trailing'
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result_dict.update(space_params)
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@staticmethod
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def _params_pretty_print(params, space: str, header: str) -> None:
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if space in params:
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space_params = Hyperopt._space_params(params, space, 5)
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if space == 'stoploss':
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print(header, space_params.get('stoploss'))
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else:
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print(header)
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pprint(space_params, indent=4)
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@staticmethod
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def _space_params(params, space: str, r: int = None) -> Dict:
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d = params[space]
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# Round floats to `r` digits after the decimal point if requested
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return round_dict(d, r) if r else d
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@staticmethod
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def is_best_loss(results, current_best_loss: float) -> bool:
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return results['loss'] < current_best_loss
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def print_results(self, results) -> None:
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"""
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Log results if it is better than any previous evaluation
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"""
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is_best = results['is_best']
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if not self.print_all:
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# Print '\n' after each 100th epoch to separate dots from the log messages.
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# Otherwise output is messy on a terminal.
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print('.', end='' if results['current_epoch'] % 100 != 0 else None) # type: ignore
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sys.stdout.flush()
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if self.print_all or is_best:
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if not self.print_all:
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# Separate the results explanation string from dots
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print("\n")
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self.print_results_explanation(results, self.total_epochs, self.print_all,
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self.print_colorized)
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@staticmethod
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def print_results_explanation(results, total_epochs, highlight_best: bool,
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print_colorized: bool) -> None:
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"""
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Log results explanation string
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"""
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explanation_str = Hyperopt._format_explanation_string(results, total_epochs)
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# Colorize output
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if print_colorized:
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if results['total_profit'] > 0:
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explanation_str = Fore.GREEN + explanation_str
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if highlight_best and results['is_best']:
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explanation_str = Style.BRIGHT + explanation_str
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print(explanation_str)
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@staticmethod
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def _format_explanation_string(results, total_epochs) -> str:
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return (("*" if results['is_initial_point'] else " ") +
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f"{results['current_epoch']:5d}/{total_epochs}: " +
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f"{results['results_explanation']} " +
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f"Objective: {results['loss']:.5f}")
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def has_space(self, space: str) -> bool:
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"""
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Tell if the space value is contained in the configuration
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"""
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# The 'trailing' space is not included in the 'default' set of spaces
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if space == 'trailing':
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return any(s in self.config['spaces'] for s in [space, 'all'])
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else:
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return any(s in self.config['spaces'] for s in [space, 'all', 'default'])
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def hyperopt_space(self, space: Optional[str] = None) -> List[Dimension]:
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"""
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Return the dimensions in the hyperoptimization space.
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:param space: Defines hyperspace to return dimensions for.
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If None, then the self.has_space() will be used to return dimensions
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for all hyperspaces used.
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"""
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spaces: List[Dimension] = []
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if space == 'buy' or (space is None and self.has_space('buy')):
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logger.debug("Hyperopt has 'buy' space")
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spaces += self.custom_hyperopt.indicator_space()
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if space == 'sell' or (space is None and self.has_space('sell')):
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logger.debug("Hyperopt has 'sell' space")
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spaces += self.custom_hyperopt.sell_indicator_space()
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if space == 'roi' or (space is None and self.has_space('roi')):
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logger.debug("Hyperopt has 'roi' space")
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spaces += self.custom_hyperopt.roi_space()
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if space == 'stoploss' or (space is None and self.has_space('stoploss')):
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logger.debug("Hyperopt has 'stoploss' space")
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spaces += self.custom_hyperopt.stoploss_space()
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if space == 'trailing' or (space is None and self.has_space('trailing')):
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logger.debug("Hyperopt has 'trailing' space")
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spaces += self.custom_hyperopt.trailing_space()
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return spaces
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def generate_optimizer(self, raw_params: List[Any], iteration=None) -> Dict:
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"""
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Used Optimize function. Called once per epoch to optimize whatever is configured.
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Keep this function as optimized as possible!
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"""
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params_dict = self._get_params_dict(raw_params)
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params_details = self._get_params_details(params_dict)
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if self.has_space('roi'):
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self.backtesting.strategy.minimal_roi = \
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self.custom_hyperopt.generate_roi_table(params_dict)
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if self.has_space('buy'):
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self.backtesting.strategy.advise_buy = \
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self.custom_hyperopt.buy_strategy_generator(params_dict)
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if self.has_space('sell'):
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self.backtesting.strategy.advise_sell = \
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self.custom_hyperopt.sell_strategy_generator(params_dict)
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if self.has_space('stoploss'):
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self.backtesting.strategy.stoploss = params_dict['stoploss']
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if self.has_space('trailing'):
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d = self.custom_hyperopt.generate_trailing_params(params_dict)
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self.backtesting.strategy.trailing_stop = d['trailing_stop']
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self.backtesting.strategy.trailing_stop_positive = d['trailing_stop_positive']
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self.backtesting.strategy.trailing_stop_positive_offset = \
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d['trailing_stop_positive_offset']
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self.backtesting.strategy.trailing_only_offset_is_reached = \
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d['trailing_only_offset_is_reached']
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processed = load(self.tickerdata_pickle)
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min_date, max_date = get_timerange(processed)
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backtesting_results = self.backtesting.backtest(
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processed=processed,
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stake_amount=self.config['stake_amount'],
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start_date=min_date,
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end_date=max_date,
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max_open_trades=self.max_open_trades,
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position_stacking=self.position_stacking,
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)
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return self._get_results_dict(backtesting_results, min_date, max_date,
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params_dict, params_details)
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def _get_results_dict(self, backtesting_results, min_date, max_date,
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params_dict, params_details):
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results_metrics = self._calculate_results_metrics(backtesting_results)
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results_explanation = self._format_results_explanation_string(results_metrics)
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trade_count = results_metrics['trade_count']
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total_profit = results_metrics['total_profit']
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# If this evaluation contains too short amount of trades to be
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# interesting -- consider it as 'bad' (assigned max. loss value)
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# in order to cast this hyperspace point away from optimization
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# path. We do not want to optimize 'hodl' strategies.
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loss: float = MAX_LOSS
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if trade_count >= self.config['hyperopt_min_trades']:
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loss = self.calculate_loss(results=backtesting_results, trade_count=trade_count,
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min_date=min_date.datetime, max_date=max_date.datetime)
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return {
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'loss': loss,
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'params_dict': params_dict,
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'params_details': params_details,
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'results_metrics': results_metrics,
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'results_explanation': results_explanation,
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'total_profit': total_profit,
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}
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def _calculate_results_metrics(self, backtesting_results: DataFrame) -> Dict:
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return {
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'trade_count': len(backtesting_results.index),
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'avg_profit': backtesting_results.profit_percent.mean() * 100.0,
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'total_profit': backtesting_results.profit_abs.sum(),
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'profit': backtesting_results.profit_percent.sum() * 100.0,
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'duration': backtesting_results.trade_duration.mean(),
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}
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def _format_results_explanation_string(self, results_metrics: Dict) -> str:
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"""
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Return the formatted results explanation in a string
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"""
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stake_cur = self.config['stake_currency']
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return (f"{results_metrics['trade_count']:6d} trades. "
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f"Avg profit {results_metrics['avg_profit']: 6.2f}%. "
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f"Total profit {results_metrics['total_profit']: 11.8f} {stake_cur} "
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f"({results_metrics['profit']: 7.2f}\N{GREEK CAPITAL LETTER SIGMA}%). "
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f"Avg duration {results_metrics['duration']:5.1f} min."
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).encode(locale.getpreferredencoding(), 'replace').decode('utf-8')
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def get_optimizer(self, dimensions: List[Dimension], cpu_count) -> Optimizer:
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return Optimizer(
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dimensions,
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base_estimator="ET",
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acq_optimizer="auto",
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n_initial_points=INITIAL_POINTS,
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acq_optimizer_kwargs={'n_jobs': cpu_count},
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random_state=self.random_state,
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)
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def fix_optimizer_models_list(self) -> None:
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"""
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WORKAROUND: Since skopt is not actively supported, this resolves problems with skopt
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memory usage, see also: https://github.com/scikit-optimize/scikit-optimize/pull/746
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This may cease working when skopt updates if implementation of this intrinsic
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part changes.
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"""
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n = len(self.opt.models) - SKOPT_MODELS_MAX_NUM
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# Keep no more than 2*SKOPT_MODELS_MAX_NUM models in the skopt models list,
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# remove the old ones. These are actually of no use, the current model
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# from the estimator is the only one used in the skopt optimizer.
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# Freqtrade code also does not inspect details of the models.
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if n >= SKOPT_MODELS_MAX_NUM:
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logger.debug(f"Fixing skopt models list, removing {n} old items...")
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del self.opt.models[0:n]
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def run_optimizer_parallel(self, parallel, asked, i) -> List:
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return parallel(delayed(
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wrap_non_picklable_objects(self.generate_optimizer))(v, i) for v in asked)
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|
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@staticmethod
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def load_previous_results(trials_file: Path) -> List:
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"""
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Load data for epochs from the file if we have one
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"""
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trials: List = []
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if trials_file.is_file() and trials_file.stat().st_size > 0:
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trials = Hyperopt._read_trials(trials_file)
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if trials[0].get('is_best') is None:
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raise OperationalException(
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|
"The file with Hyperopt results is incompatible with this version "
|
|
"of Freqtrade and cannot be loaded.")
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logger.info(f"Loaded {len(trials)} previous evaluations from disk.")
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return trials
|
|
|
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def _set_random_state(self, random_state: Optional[int]) -> int:
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return random_state or random.randint(1, 2**16 - 1)
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|
|
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def start(self) -> None:
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self.random_state = self._set_random_state(self.config.get('hyperopt_random_state', None))
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logger.info(f"Using optimizer random state: {self.random_state}")
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|
|
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data, timerange = self.backtesting.load_bt_data()
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|
|
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preprocessed = self.backtesting.strategy.tickerdata_to_dataframe(data)
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|
|
|
# Trim startup period from analyzed dataframe
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|
for pair, df in preprocessed.items():
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preprocessed[pair] = trim_dataframe(df, timerange)
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|
min_date, max_date = get_timerange(data)
|
|
|
|
logger.info(
|
|
'Hyperopting with data from %s up to %s (%s days)..',
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|
min_date.isoformat(), max_date.isoformat(), (max_date - min_date).days
|
|
)
|
|
dump(preprocessed, self.tickerdata_pickle)
|
|
|
|
# We don't need exchange instance anymore while running hyperopt
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|
self.backtesting.exchange = None # type: ignore
|
|
|
|
self.trials = self.load_previous_results(self.trials_file)
|
|
|
|
cpus = cpu_count()
|
|
logger.info(f"Found {cpus} CPU cores. Let's make them scream!")
|
|
config_jobs = self.config.get('hyperopt_jobs', -1)
|
|
logger.info(f'Number of parallel jobs set as: {config_jobs}')
|
|
|
|
self.dimensions: List[Dimension] = self.hyperopt_space()
|
|
self.opt = self.get_optimizer(self.dimensions, config_jobs)
|
|
|
|
if self.print_colorized:
|
|
colorama_init(autoreset=True)
|
|
|
|
try:
|
|
with Parallel(n_jobs=config_jobs) as parallel:
|
|
jobs = parallel._effective_n_jobs()
|
|
logger.info(f'Effective number of parallel workers used: {jobs}')
|
|
EVALS = max(self.total_epochs // jobs, 1)
|
|
for i in range(EVALS):
|
|
asked = self.opt.ask(n_points=jobs)
|
|
f_val = self.run_optimizer_parallel(parallel, asked, i)
|
|
self.opt.tell(asked, [v['loss'] for v in f_val])
|
|
self.fix_optimizer_models_list()
|
|
for j in range(jobs):
|
|
# Use human-friendly indexes here (starting from 1)
|
|
current = i * jobs + j + 1
|
|
val = f_val[j]
|
|
val['current_epoch'] = current
|
|
val['is_initial_point'] = current <= INITIAL_POINTS
|
|
logger.debug(f"Optimizer epoch evaluated: {val}")
|
|
|
|
is_best = self.is_best_loss(val, self.current_best_loss)
|
|
# This value is assigned here and not in the optimization method
|
|
# to keep proper order in the list of results. That's because
|
|
# evaluations can take different time. Here they are aligned in the
|
|
# order they will be shown to the user.
|
|
val['is_best'] = is_best
|
|
|
|
self.print_results(val)
|
|
|
|
if is_best:
|
|
self.current_best_loss = val['loss']
|
|
self.trials.append(val)
|
|
# Save results after each best epoch and every 100 epochs
|
|
if is_best or current % 100 == 0:
|
|
self.save_trials()
|
|
except KeyboardInterrupt:
|
|
print('User interrupted..')
|
|
|
|
self.save_trials(final=True)
|
|
|
|
if self.trials:
|
|
sorted_trials = sorted(self.trials, key=itemgetter('loss'))
|
|
results = sorted_trials[0]
|
|
self.print_epoch_details(results, self.total_epochs, self.print_json)
|
|
else:
|
|
# This is printed when Ctrl+C is pressed quickly, before first epochs have
|
|
# a chance to be evaluated.
|
|
print("No epochs evaluated yet, no best result.")
|