python - Django 错误 : io. UnsupportedOperation: read and ValueError: bad mode 'rb'

Question

我收到这个错误:io.UnsupoortedOperation: read我做了一些改变。我将此行 img = Image.open(f) 更改为 img = Image.open(f, "rb") 之后我收到此错误:ValueError : 坏模式 'rb'这里有什么问题？我该如何解决这个问题？

View .py

class LinkCreateView(CreateView):
    model = Link
    form_class = LinkForm

    def form_valid(self, form):
        hash = str(uuid.uuid1())
        with open("tmp_img_original_{}.png".format(hash), "wb") as f:
            res = requests.get(form.instance.url, stream=True)
            if not res.ok: raise Exception("URL'de dosya yok: 404")
            for block in res.iter_content(1024): f.write(block)

            img = Image.open(f, "rb")
            width, height = img.size
            img.thumbnail(get_size(width, height), Image.ANTIALIAS)
            img.save()

            djfile = File(f)

            form.img.save("img_tn_{}.png".format(hash), djfile, save=True)
            f.close()

        f = form.save(commit=False)
        f.rank_score = 0.0
        f.submitter = self.request.user
        f.save()

        return super(CreateView, self).form_valid(form)

Answer 1

答案是以“wb+”模式打开文件

改变这个

with open("tmp_img_original_{}.png".format(hash), "wb") as f:

到

with open("tmp_img_original_{}.png".format(hash), "wb+") as f: