Python FTP抓取和保存图片问题

Question

编辑：我搞定了，但就是下载不了任何东西...

这是我简化后的代码：

notions_ftp = ftplib.FTP(ftp_host, ftp_user, ftp_passwd)
folder = "Leisure Arts - Images"
notions_ftp.cwd(folder)
image = open("015693PR-com.jpg","wb")
notions_ftp.retrlines("RETR 015693PR-com.jpg", image.write)
send_image = open("015693PR-com.jpg", 'r')

这是我的输出：

'250 "/Leisure Arts - Images": is current directory.'
'226 Transfer complete. 0 bytes in 0.00 sec. (0.000 Kb/s)'

原帖：好吧，我今天一直在折腾这个。我对Python的FTP还比较陌生。所以我在这里搜索了一下，得到了这个：

images = notions_ftp.nlst()
    for image_name in image_names:
        if found_url == False:
            try:
                for image in images:
                    ftp_image_name = "./%s" % image_name
                    if ftp_image_name == image:
                        found_url = True
                        image_name_we_want = image_name
            except:
                pass

    # We failed to find an image for this product, it will have to be done manually
    if found_url == False:
        log.info("Image ain't there baby -- SKU: %s" % sku)
        return False
    # Hey we found something! Open the image....
    notions_ftp.retrlines("RETR %s" % image_name_we_want, open(image_name_we_want, "rb"))
    1/0

我把错误缩小到在我除以零之前的那一行。这里是错误信息：

Traceback (most recent call last):
  File "<console>", line 6, in <module>
  File "<console>", line 39, in insert_image
IOError: [Errno 2] No such file or directory: '411483CC-IT,IM.jpg'

如果你跟着代码走，你会看到图片确实在目录里，因为如果在我代码的第一行找到，就会设置image_name_we_want。我知道它在那儿，因为我自己在看FTP网站，...它确实在那儿。所以在这一切过程中，我曾经成功把图片保存到本地，这是我最想要的，但我早就忘了我是怎么做到的。不管怎样，为什么它会认为图片不在那儿，而实际上在列表中找到了呢。

好吧，我采纳了建议，现在我得到了：

14:01:18,057 ERROR [pylons-admin] Image to big or corrupt! Skipping Image for product sku: 411483
14:01:18,057 ERROR [pylons-admin] Image to big or corrupt! Skipping Image for product sku: 411483
Traceback (most recent call last):
  File "<console>", line 6, in <module>
  File "<console>", line 40, in insert_image
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ftplib.py", line 418, in retrlines
    callback(line)
TypeError: 'file' object is not callable
>>> 14:01:24,694 INFO  [pylons-admin] Script Done! Updated 0 Products w/ Images

它成功获取了第一张图片，我觉得那张真的有问题，但当它继续处理下一张时，就在文件对象上抛出了那个错误。所以这是我怎么改的，以及其余的代码在这里没有放出来：

# Hey we found something! Open the image....
    f = open(image_name_we_want, "wb")
    notions_ftp.retrlines("RETR %s" % image_name_we_want, f)
    send_image = open(image_name_we_want, 'r')

    # ...and send it for processing
    try:
        image_id = product_obj.set_image(send_image, 5, 1)
    except IOError, error:
        log.error("Image to big or corrupt! Skipping Image for product sku: %s" % sku)
        image_id = False
    else:
        if image_id == False:
            log.error("Could not Insert the image for product sku: %s" % sku)
            f.close()
            return False
        else:
            f.close()
            os.remove(image_name_we_want)
            return True

错误处理 ftp 网络编程代码调试文件对象数据抓取图片下载本地保存

Python FTP抓取和保存图片问题

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