在 scrapy 0.16 中，如何更改通过图像管道下载的图像的文件名

Question

我想将下载图像的文件名从现在获得的哈希值更改为图像alt标签或类似的东西。

from scrapy.http import Request
from scrapy.contrib.pipeline.images import ImagesPipeline
from scrapy.exceptions import DropItem
from scrapy.http import Request
class DocosPipeline(object):
    def process_item(self, item, spider):
        return item
class DocosImagesPipeline(ImagesPipeline):
def get_media_requests(self, item, info):
    for image_url in item['image_urls']:
        yield Request(image_url)
def item_completed(self, results, item, info):
    image_paths = [x['path'] for ok, x in results if ok]
    if not image_paths:
        raise DropItem("Item contains no images")
    item['image_paths'] = image_paths
    return item

我尝试覆盖image_key类，但我似乎无法正确处理。这是类：

def image_key(self, url):
    image_guid = hashlib.sha1(url).hexdigest()
    return 'full/%s.jpg' % (image_guid)

我真的被困在这里，任何帮助将不胜感激。

Answer 1

我不确定你把image_key类放在哪里，但下面的代码对我来说工作正常

class MyImagesPipeline(ImagesPipeline):
    #Name download version
    def image_key(self, url):
        image_guid = url.split('/')[-1]
        return 'full/%s' % (image_guid)
    def get_media_requests(self, item, info):