app.py 文件源码

def show_message(msg):
    """Display a message if the msg value is greater than 2 characters
    in the path.
    """
    valid_length = len(msg) >= MIN_MSG_LENGTH
    valid_name = re.match('^[a-z\-]+$', msg.lower()) is not None
    if valid_length and valid_name:
        return template(TEMPLATE_STRING, h1=msg)
    else:
        error_msg = "Sorry, only alpha characters and hyphens allowed."
        raise Exception(error_msg)