def __init__(self):
# super(JsonExporterPipelines,self).__init__(self.file)
JsonLinesItemExporter.__init__(self, file)
self.file = open('./data/data.json', 'wb')
# 初始化 exporter 实例，执行输出的文件和编码
# self.exporter = JsonLinesItemExporter(self.file,encoding='utf-8',ensure_ascii=False)
# 开启写入
self.start_exporting()
# self.exporter.export_empty_fields = True
self.first_item = True
