Write a function that returns True or False if the string contains opening and closing brackets in the right order

isValidString.py

def  isValid(s):
    bracket_dic = {
        "[":"]",
        "{":"}",
        "(":")"
    }
    open_bracket = []
    for i in s:
        if i not in bracket_dic and len(open_bracket) == 0: return False
        if i in bracket_dic:
            open_bracket.append(i)
        else:
            if bracket_dic[open_bracket[len(open_bracket)-1]] == i:
                open_bracket.pop()
            else: return False
    return len(open_bracket) == 0
print(isValid("([{})]"))
print(isValid("({]})"))
print(isValid("([{}])"))
print(isValid("({[]})"))
print(isValid("()[]{}"))
print(isValid("}"))