Reduce log verbosity during bias tester runs

freqtrade/commands/optimize_commands.py

@@ -144,5 +144,3 @@ def start_lookahead_analysis(args: Dict[str, Any]) -> None:
 
     config = setup_utils_configuration(args, RunMode.UTIL_NO_EXCHANGE)
     LookaheadAnalysisSubFunctions.start(config)
-
-

freqtrade/loggers/set_log_levels.py

@@ -2,6 +2,9 @@
 import logging
 
 
+logger = logging.getLogger(__name__)
+
+
 def set_loggers(verbosity: int = 0, api_verbosity: str = 'info') -> None:
     """
     Set the logging level for third party libraries
@@ -23,3 +26,29 @@ def set_loggers(verbosity: int = 0, api_verbosity: str = 'info') -> None:
     logging.getLogger('werkzeug').setLevel(
         logging.ERROR if api_verbosity == 'error' else logging.INFO
     )
+
+
+__BIAS_TESTER_LOGGERS = [
+    'freqtrade.resolvers',
+    'freqtrade.strategy.hyper',
+]
+
+
+def reduce_verbosity_for_bias_tester() -> None:
+    """
+    Reduce verbosity for bias tester.
+    It loads the same strategy several times, which would spam the log.
+    """
+    logger.info("Reducing verbosity for bias tester.")
+    for logger_name in __BIAS_TESTER_LOGGERS:
+        logging.getLogger(logger_name).setLevel(logging.WARNING)
+
+
+def restore_verbosity_for_bias_tester() -> None:
+    """
+    Restore verbosity after bias tester.
+    """
+    logger.info("Restoring log verbosity.")
+    log_level = logging.getLogger('freqtrade').getEffectiveLevel()
+    for logger_name in __BIAS_TESTER_LOGGERS:
+        logging.getLogger(logger_name).setLevel(log_level)

freqtrade/optimize/lookahead_analysis.py

@@ -11,6 +11,8 @@ import pandas as pd
 from freqtrade.configuration import TimeRange
 from freqtrade.data.history import get_timerange
 from freqtrade.exchange import timeframe_to_minutes
+from freqtrade.loggers.set_log_levels import (reduce_verbosity_for_bias_tester,
+                                              restore_verbosity_for_bias_tester)
 from freqtrade.optimize.backtesting import Backtesting
 
 
@@ -231,6 +233,8 @@ class LookaheadAnalysis:
         # first make a single backtest
         self.fill_full_varholder()
 
+        reduce_verbosity_for_bias_tester()
+
         # check if requirements have been met of full_varholder
         found_signals: int = self.full_varHolder.result['results'].shape[0] + 1
         if found_signals >= self.targeted_trade_amount:
@@ -251,6 +255,8 @@ class LookaheadAnalysis:
                 break
             self.analyze_row(idx, result_row)
 
+        # Restore verbosity, so it's not too quiet for the next strategy
+        restore_verbosity_for_bias_tester()
         # check and report signals
         if self.current_analysis.total_signals < self.local_config['minimum_trade_amount']:
             logger.info(f" -> {self.local_config['strategy']} : too few trades. "

tests/test_log_setup.py

@@ -7,6 +7,8 @@ import pytest
 from freqtrade.exceptions import OperationalException
 from freqtrade.loggers import (FTBufferingHandler, FTStdErrStreamHandler, set_loggers,
                                setup_logging, setup_logging_pre)
+from freqtrade.loggers.set_log_levels import (reduce_verbosity_for_bias_tester,
+                                              restore_verbosity_for_bias_tester)
 
 
 def test_set_loggers() -> None:
@@ -128,3 +130,19 @@ def test_set_loggers_journald_importerror(import_fails):
                        match=r'You need the cysystemd python package.*'):
         setup_logging(config)
     logger.handlers = orig_handlers
+
+
+def test_reduce_verbosity():
+    reduce_verbosity_for_bias_tester()
+
+    assert logging.getLogger('freqtrade.resolvers').level is logging.WARNING
+    assert logging.getLogger('freqtrade.strategy.hyper').level is logging.WARNING
+    # base level wasn't changed
+    assert logging.getLogger('freqtrade').level is logging.INFO
+
+    restore_verbosity_for_bias_tester()
+
+    assert logging.getLogger('freqtrade.resolvers').level is logging.INFO
+    assert logging.getLogger('freqtrade.strategy.hyper').level is logging.INFO
+    assert logging.getLogger('freqtrade').level is logging.INFO
+    # base level wasn't changed