don't update with empty configs

alphadia/search_step.py

@@ -95,7 +95,7 @@ def _init_config(
 
         config_updates = []
 
-        if user_config is not None:
+        if user_config:
             logger.info("loading additional config provided via CLI")
             # load update config from dict
             if isinstance(user_config, dict):
@@ -108,15 +108,15 @@ def _init_config(
                     "'config' parameter must be of type 'dict' or 'Config'"
                 )
 
-        if cli_config is not None:
+        if cli_config:
             logger.info("loading additional config provided via CLI parameters")
             cli_config_update = Config(
                 cli_config, experiment_name=USER_DEFINED_CLI_PARAM
             )
             config_updates.append(cli_config_update)
 
         # this needs to be last
-        if extra_config is not None:
+        if extra_config:
             extra_config_update = Config(extra_config, experiment_name=MULTISTEP_SEARCH)
             # need to overwrite user-defined output folder here to have correct value in config dump
             extra_config[ConfigKeys.OUTPUT_DIRECTORY] = output_folder