[SQUASH] Use HyperStrategyMixin as part of IStrategy interface.

freqtrade/optimize/hyperopt.py

@@ -70,10 +70,6 @@ class Hyperopt:
         self.backtesting = Backtesting(self.config)
 
         if not self.config.get('hyperopt'):
-            if not getattr(self.backtesting.strategy, 'HYPER_STRATEGY', False):
-                raise OperationalException('Strategy is not auto-hyperoptable. Specify --hyperopt '
-                                           'parameter or add HyperStrategyMixin mixin to your '
-                                           'strategy class.')
             self.custom_hyperopt = HyperOptAuto(self.config)
         else:
             self.custom_hyperopt = HyperOptResolver.load_hyperopt(self.config)

freqtrade/optimize/hyperopt_auto.py

@@ -7,7 +7,6 @@ from typing import Any, Callable, Dict, List
 from pandas import DataFrame
 from skopt.space import Categorical, Dimension, Integer, Real  # noqa
 
-from freqtrade.exceptions import OperationalException
 from freqtrade.optimize.hyperopt_interface import IHyperOpt
 
 
@@ -19,9 +18,6 @@ class HyperOptAuto(IHyperOpt):
     """
 
     def buy_strategy_generator(self, params: Dict[str, Any]) -> Callable:
-        if not getattr(self.strategy, 'HYPER_STRATEGY', False):
-            raise OperationalException('Strategy must inherit from IHyperStrategy.')
-
         def populate_buy_trend(dataframe: DataFrame, metadata: dict):
             for attr_name, attr in self.strategy.enumerate_parameters('buy'):
                 attr.value = params[attr_name]
@@ -30,9 +26,6 @@ class HyperOptAuto(IHyperOpt):
         return populate_buy_trend
 
     def sell_strategy_generator(self, params: Dict[str, Any]) -> Callable:
-        if not getattr(self.strategy, 'HYPER_STRATEGY', False):
-            raise OperationalException('Strategy must inherit from IHyperStrategy.')
-
         def populate_buy_trend(dataframe: DataFrame, metadata: dict):
             for attr_name, attr in self.strategy.enumerate_parameters('sell'):
                 attr.value = params[attr_name]
@@ -54,9 +47,6 @@ class HyperOptAuto(IHyperOpt):
             return default_func
 
     def _generate_indicator_space(self, category):
-        if not getattr(self.strategy, 'HYPER_STRATEGY', False):
-            raise OperationalException('Strategy must inherit from IHyperStrategy.')
-
         for attr_name, attr in self.strategy.enumerate_parameters(category):
             yield attr.get_space(attr_name)
 

freqtrade/optimize/hyperopt_interface.py

@@ -5,14 +5,14 @@ This module defines the interface to apply for hyperopt
 import logging
 import math
 from abc import ABC
-from typing import Any, Callable, Dict, List, Union
+from typing import Any, Callable, Dict, List
 
 from skopt.space import Categorical, Dimension, Integer, Real
 
 from freqtrade.exceptions import OperationalException
 from freqtrade.exchange import timeframe_to_minutes
 from freqtrade.misc import round_dict
-from freqtrade.strategy import IStrategy, HyperStrategyMixin
+from freqtrade.strategy import IStrategy
 
 logger = logging.getLogger(__name__)
 
@@ -34,7 +34,7 @@ class IHyperOpt(ABC):
     """
     ticker_interval: str  # DEPRECATED
     timeframe: str
-    strategy: Union[IStrategy, HyperStrategyMixin]
+    strategy: IStrategy
 
     def __init__(self, config: dict) -> None:
         self.config = config

freqtrade/strategy/__init__.py

@@ -2,6 +2,5 @@
 from freqtrade.exchange import (timeframe_to_minutes, timeframe_to_msecs, timeframe_to_next_date,
                                 timeframe_to_prev_date, timeframe_to_seconds)
 from freqtrade.strategy.interface import IStrategy
-from freqtrade.strategy.hyper import HyperStrategyMixin, IntParameter, FloatParameter,\
+from freqtrade.strategy.hyper import IntParameter, FloatParameter, CategoricalParameter
-    CategoricalParameter
 from freqtrade.strategy.strategy_helper import merge_informative_pair, stoploss_from_open

freqtrade/strategy/hyper.py

@@ -135,13 +135,9 @@ class HyperStrategyMixin(object):
      strategy logic.
     """
 
-    # Hint that class can be used with HyperOptAuto.
-    HYPER_STRATEGY = 1
-
     def __init__(self):
         """
         Initialize hyperoptable strategy mixin.
-        :param config:
         """
         self._load_params(getattr(self, 'buy_params', None))
         self._load_params(getattr(self, 'sell_params', None))

freqtrade/strategy/interface.py

@@ -18,6 +18,7 @@ from freqtrade.exceptions import OperationalException, StrategyError
 from freqtrade.exchange import timeframe_to_minutes, timeframe_to_seconds
 from freqtrade.exchange.exchange import timeframe_to_next_date
 from freqtrade.persistence import PairLocks, Trade
+from freqtrade.strategy.hyper import HyperStrategyMixin
 from freqtrade.strategy.strategy_wrapper import strategy_safe_wrapper
 from freqtrade.wallets import Wallets
 
@@ -59,7 +60,7 @@ class SellCheckTuple(NamedTuple):
     sell_type: SellType
 
 
-class IStrategy(ABC):
+class IStrategy(ABC, HyperStrategyMixin):
     """
     Interface for freqtrade strategies
     Defines the mandatory structure must follow any custom strategies