gboeer · December 1, 2023 10:51 · Dec 1, 2023
diff --git a/substring_idx.py b/substring_idx.py
@@ -0,0 +1,6 @@
+import re
+
+def substring_idx(text, substring):
+    """Return the starting indices of all occurrences of substring in text."""
+    pattern = re.escape(substring)
+    return [match.start() for match in re.finditer(pattern, text)]