def __init__(self, config_file="pretty.yml"):
     LatexDocument.__init__(self)
     self.__config = yaml.load(open(config_file, "r").read())
     self.text_append_prefix = self.__config["LatexText"]["append_prefix"]
     self.text_append_suffix = self.__config["LatexText"]["append_suffix"]
     self.comment_prefix = self.__config["LatexComment"]["prefix"]
     self.comment_append_prefix = self.__config["LatexComment"]["append_prefix"]
     self.comment_append_suffix = self.__config["LatexComment"]["append_suffix"]