new_trp_2.py

class Trp:
    def __init__(self, prefix, name, value='', comment=None):
        # TODO проверка префикса и имени
        self.__prefix = prefix
        self.__name = name
        self.__value = value
        self.__comment = comment

    @property
    def prefix(self):
        return self.__prefix

    @property
    def name(self):
        return self.__name

    @property
    def value(self):
        return self.__value

    @value.setter
    def value(self, value):
        # TODO проверка
        self.__value = value

    @property
    def comment(self):
        return self.__comment

    @comment.setter
    def comment(self, comment):
        # TODO проверка
        self.__comment = comment

    def __str__(self):
        _ = '$' + self.prefix + '.' + self.name + '='
        if isinstance(self.value, str):
            if self.value == BIND:
                _ += self.value
            else:
                _ += "'" + self.value + "'"
        else:
            _ += str(self.value)
        if self.comment is not None:
            _ += '"' + self.comment + '"'
        _ += ';'
        return _

    def __repr__(self):
        return self.__str__()

    def __eq__(self, other):
        return isinstance(other, Trp) \
               and self.name == other.name \
               and self.name == other.name \
               and self.value == self.value

    def __hash__(self):
        return hash((self.prefix, self.name))


class TrpStr:
    def __init__(self, *trps):
        self.trps = set(trps)

    def __add__(self, other):
        if isinstance(other, Trp):
            return set((other,) + tuple(self.trps))
        elif isinstance(other, TrpStr):
            return set(tuple(other.trps) + tuple(self.trps))