I tried another approach by splitting the input into two halves and then comparing both halves

here is my code and it works :)

def balanced_brackets(s):
    brackets = {'(':')', '[':']', '{':'}'}
    if len(s)%2 != 0:
        return False
    half_s_len=len(s)//2-1
    half_s= s[:half_s_len]
    for i in range(len(half_s)):
        if not (s[i] in brackets and brackets[s[i]] == s[(-1-i)]):
            return False
    return True