Fixed bug related to sets of sets with missing inputs or outputs

scripts/preprocess_data.py

@@ -284,7 +284,13 @@ def file_output_function(if_dict, str_dict, set_list, set_name, extra_char):
                     line = line.replace(',','').replace(':=[',':= ').replace(']*','').replace("'","")
                 else:
                     line = line.replace('),',')').replace('[(',' (').replace(')]',')').replace("'","")
-                file_out.write(line + ';' + '\n')
+            else:
+                line = set_name + str(each) + ']:='
+
+            file_out.write(line + ';' + '\n')
+
+    storage_list_len = {'otoole': 0,
+                        'momani': 1}
 
     # Append lines at the end of the data file
     with open(data_outfile, 'w') as file_out:  # 'a' to open in 'append' mode
@@ -295,7 +301,8 @@ def file_output_function(if_dict, str_dict, set_list, set_name, extra_char):
         file_output_function(dict_inp, dict_inp, fuel_list, 'set MODExTECHNOLOGYperFUELin[', '')
         file_output_function(dict_all, dict_all, tech_list, 'set MODEperTECHNOLOGY[', '*')
 
-        if len(storage_list) > 0:
+        if len(storage_list) > storage_list_len[data_format]:
+            print(len(storage_list))
             file_output_function(dict_stt, dict_stt, storage_list, 'set MODExTECHNOLOGYperSTORAGEto[', '')
             file_output_function(dict_stf, dict_stf, storage_list, 'set MODExTECHNOLOGYperSTORAGEfrom[', '')