Update util.py

util.py

@@ -1,3 +1,9 @@
-def string_to_list(string):
+def string_to_list_int(string):
     li = list(string.split(","))
-    return li
+    res = [int(i) for i in li]
+    return res
+    
+def string_to_list_float(string):
+    li = list(string.split(","))
+    res = [float(i) for i in li]
+    return res