scrapy 中修改图片的名称

在原来下载图片基础上：

1.在设置文件中定义好图像名称字段

IMAGES_NAME_FIELD = 'image_names'

2.在images.py文件中修改名称

类变量中添加：

DEFAULT_IMAGES_URLS_FIELD = 'image_urls'
DEFAULT_IMAGES_RESULT_FIELD = 'images'
IMAGES_NAME_FIELD = 'image_names'

初始化：

self.images_name_field = settings.get(
    resolve('IMAGES_NAME_FIELD'), self.IMAGES_NAME_FIELD
)

将file_name内容携带出去

def get_media_requests(self, item, info):
    return [Request(x, meta={'file_name': item.get(self.images_name_field, '')}) for x in item.get(self.images_urls_field, [])]

修改image_guid就ok了

image_guid = request.meta['file_name']