def METHOD_NAME(self):
    def convert(a: str) -> int:
        return len(a)
    dq, path_tmp, pre = self.seed_small_grep(self.file_10e0)
    dq.map(convert) \
        .store_textfile(path_tmp)
    def convert_validation(file):
        return map(convert, filter(pre, file.readlines()))
    def convert_outputed(file):
        return map(lambda x: int(x), file.read().splitlines())
    self.validate_files(
        self.file_10e0,
        path_tmp,
        convert_validation,
        convert_outputed
    )