Add visualize codes for Q

lib/utils/str_utils.py

@@ -8,10 +8,14 @@ def split_str2indexes(string: str, max_check: int, length_limit=5):
         if len(srange) != 2:
             raise ValueError("invalid srange : {:}".format(srange))
         if length_limit is not None:
-            assert len(srange[0]) == len(srange[1]) == length_limit, "invalid srange : {:}".format(srange)
+            assert (
+                len(srange[0]) == len(srange[1]) == length_limit
+            ), "invalid srange : {:}".format(srange)
         srange = (int(srange[0]), int(srange[1]))
         if not (0 <= srange[0] <= srange[1] < max_check):
-            raise ValueError("{:} vs {:} vs {:}".format(srange[0], srange[1], max_check))
+            raise ValueError(
+                "{:} vs {:} vs {:}".format(srange[0], srange[1], max_check)
+            )
         for i in range(srange[0], srange[1] + 1):
             indexes.add(i)
     return indexes