SSL: CERTIFICATE_VERIFY_FAILED when loading METR-LA Dataset

[PietroLodiRizzini]

I was trying to load the METRLA dataset via the following code:

loader = METRLADatasetLoader()
dataset = loader.get_dataset(num_timesteps_in=12, num_timesteps_out=12)

but the following error arises:

---------------------------------------------------------------------------
SSLCertVerificationError                  Traceback (most recent call last)
[/usr/lib/python3.10/urllib/request.py](https://localhost:8080/#) in do_open(self, http_class, req, **http_conn_args)
   1347             try:
-> 1348                 h.request(req.get_method(), req.selector, req.data, headers,
   1349                           encode_chunked=req.has_header('Transfer-encoding'))

18 frames
SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1007)

During handling of the above exception, another exception occurred:

URLError                                  Traceback (most recent call last)
[/usr/lib/python3.10/urllib/request.py](https://localhost:8080/#) in do_open(self, http_class, req, **http_conn_args)
   1349                           encode_chunked=req.has_header('Transfer-encoding'))
   1350             except OSError as err: # timeout error
-> 1351                 raise URLError(err)
   1352             r = h.getresponse()
   1353         except:

URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: certificate has expired (_ssl.c:1007)>

[PietroLodiRizzini]

temporarily solved by manually downloading the zip and setting raw_data_dir in the data loader constructor, but the SSL problem for graphmining.ai persists

[Daniel-Signatur]

Adding

import ssl
ssl._create_default_https_context = ssl._create_unverified_context

at the start of the code, also solves the problem.