烧瓶属性错误：'unicode'对象没有属性'tell'

Question

我试图用Flask应用程序将图像上传到Amazon S3，并将密钥和元数据存储在Redis db中。这是我的应用程序:

def s3upload(image, acl='public-read'):
    key = app.config['S3_KEY']
    secret = app.config['S3_SECRET']
    bucket = app.config['S3_BUCKET']
    conn = S3Connection(key, secret)
    mybucket = conn.get_bucket(bucket)
    r = redis.StrictRedis(connection_pool = pool)
    iid = r.incr('image')
    now = time.time()
    r.zadd('image:created_on', now, iid)

    k = Key(mybucket)
    k.key = iid
    k.set_contents_from_file(image)
    return iid
@app.route('/', methods = ['GET', 'POST'])
def index():
    form = ImageForm(request.form)
    print 'CHECKING REQUEST'
    if form.validate_on_submit():
        print 'VALID REQUEST'
        image = form.image.data
        s3upload(image)
    else:
        image = None
    r = redis.StrictRedis(connection_pool = pool)
    last_ten = r.zrange('image:created_on', 0, 9)
    print last_ten
    images = []
    key = app.config['S3_KEY']
    secret = app.config['S3_SECRET']
    bucket = app.config['S3_BUCKET']
    conn = S3Connection(key, secret)
    mybucket = conn.get_bucket(bucket)  

    for image in last_ten:
        images.append(mybucket.get_key(image, validate = False))

    return render_template('index.html', form=form, images=images)

页面加载成功，但是当我尝试上传图像时，它返回一个错误:

AttributeError: 'unicode' object has no attribute 'tell' at set_contents_from_file .

失败行为:spos = fp.tell()

Answer 1

k.set_contents_from_file期望有一个名为tell()的方法的类文件对象，您传递给它一个unicode字符串。

你需要用k.set_contents_from_string代替