HTTP 错误 404：在下载 Caltech101 数据集时找不到

Question

我正在尝试在 Google colab 中下载 Caltech101 dataset，但出现以下错误：

!wget 'http://www.vision.caltech.edu/Image_Datasets/Caltech256/256_ObjectCategories.tar.gz'

'--2020-07-24 04:02:05-- http://www.vision.caltech.edu/Image_Datasets/Caltech256/256_ObjectCategories.tar.gz Resolving www.vision.caltech.edu (www.vision.caltech.edu)... 34.208.54.77 Connecting to www.vision.caltech.edu (www.vision.caltech.edu)|34.208.54.77|:80... connected. HTTP request sent, awaiting response... 404 Not Found 2020-07-24 04:02:05 ERROR 404: Not Found.'

我也试过：

import urllib
urllib.request.urlretrieve(
    "http://www.vision.caltech.edu/Image_Datasets/Caltech101/101_ObjectCategories.tar.gz", "my-tar.gz"
)

得到同样的错误：

HTTPError Traceback (most recent call last) in () 1 import urllib 2 urllib.request.urlretrieve( ----> 3 "http://www.vision.caltech.edu/Image_Datasets/Caltech101/101_ObjectCategories.tar.gz", "my-tar.gz" 4 )

6 frames /usr/lib/python3.6/urllib/request.py in urlretrieve(url, filename, reporthook, data) 246 url_type, path = splittype(url) 247 --> 248 with contextlib.closing(urlopen(url, data)) as fp: 249 headers = fp.info() 250

/usr/lib/python3.6/urllib/request.py in urlopen(url, data, timeout, cafile, capath, cadefault, context) 221 else: 222 opener = _opener --> 223 return opener.open(url, data, timeout) 224 225 def install_opener(opener):

/usr/lib/python3.6/urllib/request.py in open(self, fullurl, data, timeout) 530 for processor in self.process_response.get(protocol, []): 531 meth = getattr(processor, meth_name) --> 532 response = meth(req, response) 533 534 return response

/usr/lib/python3.6/urllib/request.py in http_response(self, request, response) 640 if not (200 <= code < 300): 641 response = self.parent.error( --> 642 'http', request, response, code, msg, hdrs) 643 644 return response

/usr/lib/python3.6/urllib/request.py in error(self, proto, *args) 568 if http_err: 569 args = (dict, 'default', 'http_error_default') + orig_args --> 570 return self._call_chain(*args) 571 572 # XXX probably also want an abstract factory that knows when it makes

/usr/lib/python3.6/urllib/request.py in _call_chain(self, chain, kind, meth_name, *args) 502 for handler in handlers: 503 func = getattr(handler, meth_name) --> 504 result = func(*args) 505 if result is not None: 506 return result

/usr/lib/python3.6/urllib/request.py in http_error_default(self, req, fp, code, msg, hdrs) 648 class HTTPDefaultErrorHandler(BaseHandler): 649 def http_error_default(self, req, fp, code, msg, hdrs): --> 650 raise HTTPError(req.full_url, code, msg, hdrs, fp) 651 652 class HTTPRedirectHandler(BaseHandler):

HTTPError: HTTP Error 404: Not Found

你能帮我弄清楚这里的问题是什么吗？谢谢

Answer 1

问题在于服务器实际上没有您要查找的内容。网站上没有 CalTech 256 数据集。

您可以尝试从https://www.kaggle.com/jessicali9530/caltech256

下载

HTTP 错误 404：在下载 Caltech101 数据集时找不到

HTTP Error 404: Not Found in downloading Caltech101 dataset

linux

download

tar

dataset

google-colaboratory