Balanced Brackets

Write is_balanced(s) returning True when every bracket ()[]{} is closed in the right order. Print the result for four test strings.

{[()]} True
{[(])} False
((())) True
(] False

Push opening brackets onto a stack; on a closer, the popped item must be its partner. The stack must be empty at the end.

def is_balanced(s):
    pairs = {")": "(", "]": "[", "}": "{"}
    stack = []
    for ch in s:
        if ch in "([{":
            stack.append(ch)
        elif ch in pairs:
            if not stack or stack.pop() != pairs[ch]:
                return False
    return not stack

for test in ("{[()]}", "{[(])}", "((()))", "(]"):
    print(f"{test} {is_balanced(test)}")

Run your code to check it…