Numbers Search

def numbers_searching(*args):
    duplicates = []
    missing_number = 0
    for nums in range(len(args)):
        for index in range(nums+ 1, len(args)):
            if args[nums] == args[index] and args[nums] not in duplicates:
                duplicates.append(args[nums])
    for n in range(min(args), max(args)):
        if n not in duplicates:
            missing_number = n
            break
    return [missing_number , sorted(duplicates)]