def METHOD_NAME(filename):
    """Verify that a filename is the correct format."""
    if filename == "":
        return False
    if any(
        char in filename
        for char in [
            "#",
            "%",
            "&",
            "{",
            "}",
            "<",
            ">",
            "!",
            "`",
            "$",
            "+",
            "*",
            "'",
            '"',
            "?",
            "=",
            "/",
            ":",
            " ",
            "@",
        ]
    ):
        return False
    else:
        return True