如何从集合中的字符串中删除多余的引号？

Question

I am working on a method and trying to return a list in the format List[Tuple[Set[str], Set[str]]] but I can't figure out how to remove extra quotes. self._history[dates[dat]]._ridings is a list of strings. what this method does is check the voting areas in a election then comparing those areas with next election or previous election to see which areas were in first but not in second and which were in second but not in first and those are the two elements of tuple. there could be more than one area which may or may not be present in this election. self._history[dates[dat]]._ridings is a list with certain areas in a election and i add 1 to dat so it compares with the next election so every election is compared with the previous one.

I have tried using split and replace methods but doesn't seems to be working since it is a set not string

list1 = []
    dates = list(self._history)
    for dat in range(0, len(dates) - 1):
        a = set(self._history[dates[dat]]._ridings)
        b = set(self._history[dates[dat + 1]]._ridings)
        list1.append(tuple([(a-b), (b-a)]))
    return list1

Expected : [({"St. Paul's...St. Paul's"})]
Actual : [({'"St. Paul.... Paul\\'s"'})]

Answer 1

使用 substring 函数删除索引 0 处的字符和索引处的字符（字符串长度 - 1）