Pythom Scrapy框架Imagepipeline组件下载gif类型文件处理问题，,默认情况下，使用Scra

试着覆盖convertimage

https://github.com/scrapy/scrapy/blob/master/scrapy/contrib/pipeline/images.py#L87

__author__ = 'Fly'  #coding:utf-8  from scrapy.contrib.pipeline.images import ImagesPipeline  from scrapy.http import Request  from scrapy.exceptions import DropItem  class MyImagesPipeline(ImagesPipeline):      def file_path(self, request, response=None, info=None):          image_guid = request.url.split('/')[-1]          return 'full/%s' % (image_guid)      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")          return item    def convert_image(self, image, size=None):         buf = StringIO()        image.save(buf)        return image, buf

试试，可能会出错，文档上说这个pipeline会：

Convert all downloaded images to a common format (JPG) and mode (RGB)Avoid re-downloading images which were downloaded recentlyThumbnail generationCheck images width/height to make sure they meet a minimum constraint