charfinder.py 文件源码

def find_chars(self, query, start=0, stop=None):
        stop = sys.maxsize if stop is None else stop
        result_sets = []
        for word in tokenize(query):
            if word in self.index:
                result_sets.append(self.index[word])
            else:  # shorcut: no such word
                result_sets = []
                break
        if result_sets:
            result = result_sets[0].intersection(*result_sets[1:])
            result = sorted(result)  # must sort for consistency
            result_iter = itertools.islice(result, start, stop)
            return QueryResult(len(result),
                               (char for char in result_iter))
        return QueryResult(0, ())