balanced parens and brackets

import Queue

def matching_parens(in_list):
    paren_q = Queue.Queue()
    for item in in_list:
        if item in ('(','['):
            paren_q.put(item)
        elif item == ')':
            check = paren_q.get()
            if check == '(':
                continue
            else:
                return False
        elif item == ']':
            check = paren_q.get()
            if check == '[':
                continue
            else:
                return False
    if paren_q.qsize():
        return False
    else:
        return True

def main():
    in_list = ['(','(',')']
    print matching_parens(in_list)
    in_list = ['(','(',')',')']
    print matching_parens(in_list)
    in_list = ['(','[','(',')',']',')']
    print matching_parens(in_list)
main()