Fix a bug and remove sys.exit line from cleaning script.

src/features/all_cleaning_individual/straw/main.py

@@ -36,6 +36,9 @@ def straw_cleaning(sensor_data_files, provider):
     phone_data_yield_unit = provider["PHONE_DATA_YIELD_FEATURE"].split("_")[3].lower()
     phone_data_yield_column = "phone_data_yield_rapids_ratiovalidyielded" + phone_data_yield_unit
 
+    if features.empty:
+        return features
+
     features = edy.calculate_empatica_data_yield(features)
 
     if not phone_data_yield_column in features.columns and not "empatica_data_yield" in features.columns:

src/features/all_cleaning_overall/straw/main.py

@@ -23,9 +23,6 @@ def straw_cleaning(sensor_data_files, provider, target):
 
     graph_bf_af(features, "1target_rows_before")
 
-    # TODO: need to check whether all of the participants contain E4 columns
-    sys.exit()
-
     # (1.0) OVERRIDE STRESSFULNESS EVENT TARGETS IF ERS SEGMENTING_METHOD IS "STRESS_EVENT"
     if config["TIME_SEGMENTS"]["TAILORED_EVENTS"]["SEGMENTING_METHOD"] == "stress_event":