Add option to disable file logging

tianshou/highlevel/experiment.py

@@ -108,6 +108,9 @@ class ExperimentConfig:
     in this directory based on the run's experiment name"""
     persistence_enabled: bool = True
     """Whether persistence is enabled, allowing files to be stored"""
+    log_file_enabled: bool = True
+    """Whether to write to a log file; has no effect if `persistence_enabled` is False. 
+    Disable this if you have externally configured log file generation."""
     policy_persistence_mode: PolicyPersistence.Mode = PolicyPersistence.Mode.POLICY
     """Controls the way in which the policy is persisted"""
 
@@ -205,7 +208,7 @@ class Experiment(ToStringMixin):
 
         with logging.FileLoggerContext(
             os.path.join(persistence_dir, self.LOG_FILENAME),
-            enabled=use_persistence,
+            enabled=use_persistence and self.config.log_file_enabled,
         ):
             # log initial information
             log.info(f"Running experiment (name='{experiment_name}'):\n{self.pprints()}")