478 lines
21 KiB
Python
478 lines
21 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 logging
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import random
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import warnings
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from datetime import datetime, timezone
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from math import ceil
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from pathlib import Path
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from typing import Any, Dict, List, Optional
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import numpy as np
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import progressbar
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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, wrap_non_picklable_objects
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from pandas import DataFrame
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from freqtrade.constants import DATETIME_PRINT_FORMAT, LAST_BT_RESULT_FN
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from freqtrade.data.converter import trim_dataframes
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from freqtrade.data.history import get_timerange
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from freqtrade.misc import file_dump_json, plural
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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_auto import HyperOptAuto
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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.optimize.hyperopt_tools import HyperoptTools
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from freqtrade.optimize.optimize_reports import generate_strategy_stats
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from freqtrade.resolvers.hyperopt_resolver import HyperOptLossResolver, 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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progressbar.streams.wrap_stderr()
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progressbar.streams.wrap_stdout()
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logger = logging.getLogger(__name__)
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INITIAL_POINTS = 30
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# Keep no more than SKOPT_MODEL_QUEUE_SIZE models
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# in the skopt model queue, to optimize memory consumption
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SKOPT_MODEL_QUEUE_SIZE = 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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custom_hyperopt: IHyperOpt
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def __init__(self, config: Dict[str, Any]) -> None:
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self.buy_space: List[Dimension] = []
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self.sell_space: List[Dimension] = []
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self.roi_space: List[Dimension] = []
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self.stoploss_space: List[Dimension] = []
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self.trailing_space: List[Dimension] = []
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self.dimensions: List[Dimension] = []
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self.config = config
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self.backtesting = Backtesting(self.config)
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if not self.config.get('hyperopt'):
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self.custom_hyperopt = HyperOptAuto(self.config)
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else:
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self.custom_hyperopt = HyperOptResolver.load_hyperopt(self.config)
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self.backtesting._set_strategy(self.backtesting.strategylist[0])
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self.custom_hyperopt.strategy = self.backtesting.strategy
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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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time_now = datetime.now().strftime("%Y-%m-%d_%H-%M-%S")
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strategy = str(self.config['strategy'])
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self.results_file: Path = (self.config['user_data_dir'] / 'hyperopt_results' /
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f'strategy_{strategy}_{time_now}.fthypt')
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self.data_pickle_file = (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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self.clean_hyperopt()
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self.num_epochs_saved = 0
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self.current_best_epoch: Optional[Dict[str, Any]] = None
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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 = ( # type: ignore
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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 = ( # type: ignore
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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 = ( # type: ignore
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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 HyperoptTools.has_space(self.config, '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.hyperopt_table_header = 0
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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.data_pickle_file, self.results_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, dimensions: List[Dimension], raw_params: List[Any]) -> Dict:
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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_result(self, epoch: Dict) -> None:
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"""
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Save hyperopt results to file
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Store one line per epoch.
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While not a valid json object - this allows appending easily.
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:param epoch: result dictionary for this epoch.
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"""
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def default_parser(x):
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if isinstance(x, np.integer):
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return int(x)
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return str(x)
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with self.results_file.open('a') as f:
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rapidjson.dump(epoch, f, default=default_parser,
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number_mode=rapidjson.NM_NATIVE | rapidjson.NM_NAN)
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f.write("\n")
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self.num_epochs_saved += 1
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logger.debug(f"{self.num_epochs_saved} {plural(self.num_epochs_saved, 'epoch')} "
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f"saved to '{self.results_file}'.")
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# Store hyperopt filename
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latest_filename = Path.joinpath(self.results_file.parent, LAST_BT_RESULT_FN)
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file_dump_json(latest_filename, {'latest_hyperopt': str(self.results_file.name)},
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log=False)
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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 HyperoptTools.has_space(self.config, 'buy'):
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result['buy'] = {p.name: params.get(p.name) for p in self.buy_space}
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if HyperoptTools.has_space(self.config, 'sell'):
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result['sell'] = {p.name: params.get(p.name) for p in self.sell_space}
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if HyperoptTools.has_space(self.config, 'roi'):
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result['roi'] = {str(k): v for k, v in
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self.custom_hyperopt.generate_roi_table(params).items()}
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if HyperoptTools.has_space(self.config, 'stoploss'):
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result['stoploss'] = {p.name: params.get(p.name) for p in self.stoploss_space}
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if HyperoptTools.has_space(self.config, 'trailing'):
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result['trailing'] = self.custom_hyperopt.generate_trailing_params(params)
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return result
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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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TODO: this should be moved to HyperoptTools too
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"""
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is_best = results['is_best']
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if self.print_all or is_best:
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print(
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HyperoptTools.get_result_table(
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self.config, results, self.total_epochs,
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self.print_all, self.print_colorized,
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self.hyperopt_table_header
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)
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)
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self.hyperopt_table_header = 2
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def init_spaces(self):
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"""
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Assign the dimensions in the hyperoptimization space.
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"""
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if HyperoptTools.has_space(self.config, 'buy'):
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logger.debug("Hyperopt has 'buy' space")
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self.buy_space = self.custom_hyperopt.indicator_space()
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if HyperoptTools.has_space(self.config, 'sell'):
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logger.debug("Hyperopt has 'sell' space")
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self.sell_space = self.custom_hyperopt.sell_indicator_space()
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if HyperoptTools.has_space(self.config, 'roi'):
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logger.debug("Hyperopt has 'roi' space")
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self.roi_space = self.custom_hyperopt.roi_space()
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if HyperoptTools.has_space(self.config, 'stoploss'):
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logger.debug("Hyperopt has 'stoploss' space")
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self.stoploss_space = self.custom_hyperopt.stoploss_space()
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if HyperoptTools.has_space(self.config, 'trailing'):
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logger.debug("Hyperopt has 'trailing' space")
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self.trailing_space = self.custom_hyperopt.trailing_space()
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self.dimensions = (self.buy_space + self.sell_space + self.roi_space +
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self.stoploss_space + self.trailing_space)
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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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backtest_start_time = datetime.now(timezone.utc)
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params_dict = self._get_params_dict(self.dimensions, raw_params)
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# Apply parameters
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if HyperoptTools.has_space(self.config, 'roi'):
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self.backtesting.strategy.minimal_roi = ( # type: ignore
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self.custom_hyperopt.generate_roi_table(params_dict))
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if HyperoptTools.has_space(self.config, 'buy'):
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self.backtesting.strategy.advise_buy = ( # type: ignore
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self.custom_hyperopt.buy_strategy_generator(params_dict))
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if HyperoptTools.has_space(self.config, 'sell'):
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self.backtesting.strategy.advise_sell = ( # type: ignore
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self.custom_hyperopt.sell_strategy_generator(params_dict))
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if HyperoptTools.has_space(self.config, 'stoploss'):
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self.backtesting.strategy.stoploss = params_dict['stoploss']
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if HyperoptTools.has_space(self.config, '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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with self.data_pickle_file.open('rb') as f:
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processed = load(f, mmap_mode='r')
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bt_results = self.backtesting.backtest(
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processed=processed,
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start_date=self.min_date,
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end_date=self.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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enable_protections=self.config.get('enable_protections', False),
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)
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backtest_end_time = datetime.now(timezone.utc)
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bt_results.update({
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'backtest_start_time': int(backtest_start_time.timestamp()),
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'backtest_end_time': int(backtest_end_time.timestamp()),
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})
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return self._get_results_dict(bt_results, self.min_date, self.max_date,
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params_dict,
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processed=processed)
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def _get_results_dict(self, backtesting_results, min_date, max_date,
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params_dict, processed: Dict[str, DataFrame]
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) -> Dict[str, Any]:
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params_details = self._get_params_details(params_dict)
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strat_stats = generate_strategy_stats(
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processed, self.backtesting.strategy.get_strategy_name(),
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backtesting_results, min_date, max_date, market_change=0
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)
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results_explanation = HyperoptTools.format_results_explanation_string(
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strat_stats, self.config['stake_currency'])
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not_optimized = self.backtesting.strategy.get_params_dict()
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trade_count = strat_stats['total_trades']
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total_profit = strat_stats['profit_total']
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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['results'],
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trade_count=trade_count,
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min_date=min_date, max_date=max_date,
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config=self.config, processed=processed)
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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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'params_not_optimized': not_optimized,
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'results_metrics': strat_stats,
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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 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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model_queue_size=SKOPT_MODEL_QUEUE_SIZE,
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)
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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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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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def prepare_hyperopt_data(self) -> None:
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data, timerange = self.backtesting.load_bt_data()
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logger.info("Dataload complete. Calculating indicators")
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preprocessed = self.backtesting.strategy.ohlcvdata_to_dataframe(data)
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# Trim startup period from analyzed dataframe
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processed = trim_dataframes(preprocessed, timerange, self.backtesting.required_startup)
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self.min_date, self.max_date = get_timerange(processed)
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logger.info(f'Hyperopting with data from {self.min_date.strftime(DATETIME_PRINT_FORMAT)} '
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f'up to {self.max_date.strftime(DATETIME_PRINT_FORMAT)} '
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f'({(self.max_date - self.min_date).days} days)..')
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dump(processed, self.data_pickle_file)
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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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self.hyperopt_table_header = -1
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# Initialize spaces ...
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self.init_spaces()
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self.prepare_hyperopt_data()
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# We don't need exchange instance anymore while running hyperopt
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self.backtesting.exchange.close()
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self.backtesting.exchange._api = None # type: ignore
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self.backtesting.exchange._api_async = None # type: ignore
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# self.backtesting.exchange = None # type: ignore
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self.backtesting.pairlists = None # type: ignore
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cpus = cpu_count()
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logger.info(f"Found {cpus} CPU cores. Let's make them scream!")
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config_jobs = self.config.get('hyperopt_jobs', -1)
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logger.info(f'Number of parallel jobs set as: {config_jobs}')
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self.opt = self.get_optimizer(self.dimensions, config_jobs)
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if self.print_colorized:
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colorama_init(autoreset=True)
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try:
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with Parallel(n_jobs=config_jobs) as parallel:
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jobs = parallel._effective_n_jobs()
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logger.info(f'Effective number of parallel workers used: {jobs}')
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# Define progressbar
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if self.print_colorized:
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widgets = [
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' [Epoch ', progressbar.Counter(), ' of ', str(self.total_epochs),
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' (', progressbar.Percentage(), ')] ',
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progressbar.Bar(marker=progressbar.AnimatedMarker(
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fill='\N{FULL BLOCK}',
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fill_wrap=Fore.GREEN + '{}' + Fore.RESET,
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marker_wrap=Style.BRIGHT + '{}' + Style.RESET_ALL,
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)),
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' [', progressbar.ETA(), ', ', progressbar.Timer(), ']',
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]
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else:
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widgets = [
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' [Epoch ', progressbar.Counter(), ' of ', str(self.total_epochs),
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' (', progressbar.Percentage(), ')] ',
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progressbar.Bar(marker=progressbar.AnimatedMarker(
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fill='\N{FULL BLOCK}',
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)),
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' [', progressbar.ETA(), ', ', progressbar.Timer(), ']',
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]
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with progressbar.ProgressBar(
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max_value=self.total_epochs, redirect_stdout=False, redirect_stderr=False,
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widgets=widgets
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) as pbar:
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EVALS = ceil(self.total_epochs / jobs)
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for i in range(EVALS):
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# Correct the number of epochs to be processed for the last
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# iteration (should not exceed self.total_epochs in total)
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n_rest = (i + 1) * jobs - self.total_epochs
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current_jobs = jobs - n_rest if n_rest > 0 else jobs
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asked = self.opt.ask(n_points=current_jobs)
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f_val = self.run_optimizer_parallel(parallel, asked, i)
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self.opt.tell(asked, [v['loss'] for v in f_val])
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# Calculate progressbar outputs
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for j, val in enumerate(f_val):
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# Use human-friendly indexes here (starting from 1)
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current = i * jobs + j + 1
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val['current_epoch'] = current
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val['is_initial_point'] = current <= INITIAL_POINTS
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logger.debug(f"Optimizer epoch evaluated: {val}")
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is_best = HyperoptTools.is_best_loss(val, self.current_best_loss)
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# This value is assigned here and not in the optimization method
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# 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.
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val['is_best'] = is_best
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self.print_results(val)
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|
|
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if is_best:
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self.current_best_loss = val['loss']
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self.current_best_epoch = val
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|
|
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self._save_result(val)
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|
|
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pbar.update(current)
|
|
|
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except KeyboardInterrupt:
|
|
print('User interrupted..')
|
|
|
|
logger.info(f"{self.num_epochs_saved} {plural(self.num_epochs_saved, 'epoch')} "
|
|
f"saved to '{self.results_file}'.")
|
|
|
|
if self.current_best_epoch:
|
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HyperoptTools.print_epoch_details(self.current_best_epoch, self.total_epochs,
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|
self.print_json)
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else:
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# 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.")
|