striplog/lexicon.py
def categories(self):
        """
        Lists the categories in the lexicon, except the
        optional categories.

        Returns:
            list: A list of strings of category names.
        """
        keys = [k for k in self.__dict__.keys() if k not in SPECIAL]
        return keys
def categories(self):
        keys = [k for k in self.__dict__.keys() if k not in SPECIAL]
        return keys
def categories ( self ) : keys = [ k for k in self . __dict__ . keys ( ) if k not in SPECIAL ] return keys
Lists the categories in the lexicon, except the
        optional categories.

        Returns:
            list: A list of strings of category names.
Lists the categories in the lexicon except the optional categories .