u6

u6/matching_brackets.py

@@ -0,0 +1,18 @@
+def is_paired(seq: str) -> bool:
+    stack = []
+
+    open_brackets = "([{"
+    close_brackets = ")]}"
+
+    for ch in seq:
+        if(ch in open_brackets):
+            stack.append(ch)
+            continue
+
+        matched_closed = close_brackets.find(ch)
+        if(matched_closed != -1):
+            if(not len(stack) or stack[-1] != open_brackets[matched_closed]):
+                return False
+            else:
+                stack.pop()
+    return not len(stack)