a failure appeared when i tried to install pytorch

Question

When i tried to install pytorch, an error appeared in my anaconda prompt. I followed the instructions of this answer

Try to install PyTorch using pip:

First create a Conda environment using:

conda create -n env_pytorch python=3.6

Activate the environment using:

conda activate env_pytorch

Now install PyTorch using pip:

pip install torchvision

Note: This will install both torch and torchvision.

Now go to Python shell and import using the command:

import torch

import torchvision

When i run the instruction

pip install torchvision

An error appeared. The error information is below: ''' ERROR: Exception: Traceback (most recent call last): File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\cli\base_command.py", line 173, in _main status = self.run(options, args) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\cli\req_command.py", line 203, in wrapper return func(self, options, args) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\commands\install.py", line 316, in run reqs, check_supported_wheels=not options.target_dir File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\resolution\resolvelib\resolver.py", line 95, in resolve collected.requirements, max_rounds=try_to_avoid_resolution_too_deep File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\resolvelib\resolvers.py", line 472, in resolve state = resolution.resolve(requirements, max_rounds=max_rounds) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\resolvelib\resolvers.py", line 341, in resolve self._add_to_criteria(self.state.criteria, r, parent=None) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\resolvelib\resolvers.py", line 172, in _add_to_criteria if not criterion.candidates: File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\resolvelib\structs.py", line 151, in bool return bool(self._sequence) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\resolution\resolvelib\found_candidates.py", line 140, in bool return any(self) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\resolution\resolvelib\found_candidates.py", line 128, in return (c for c in iterator if id(c) not in self._incompatible_ids) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\resolution\resolvelib\found_candidates.py", line 29, in _iter_built for version, func in infos: File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\resolution\resolvelib\factory.py", line 275, in iter_index_candidate_infos hashes=hashes, File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\index\package_finder.py", line 851, in find_best_candidate candidates = self.find_all_candidates(project_name) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\index\package_finder.py", line 798, in find_all_candidates page_candidates = list(page_candidates_it) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\index\sources.py", line 134, in page_candidates yield from self._candidates_from_page(self._link) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\index\package_finder.py", line 758, in process_project_url html_page = self._link_collector.fetch_page(project_url) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\index\collector.py", line 490, in fetch_page return _get_html_page(location, session=self.session) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\index\collector.py", line 400, in _get_html_page resp = _get_html_response(url, session=session) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\index\collector.py", line 132, in _get_html_response "Cache-Control": "max-age=0", File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\requests\sessions.py", line 555, in get return self.request('GET', url, **kwargs) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_internal\network\session.py", line 454, in request return super().request(method, url, *args, **kwargs) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\requests\sessions.py", line 542, in request resp = self.send(prep, **send_kwargs) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\requests\sessions.py", line 655, in send r = adapter.send(request, **kwargs) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\cachecontrol\adapter.py", line 53, in send resp = super(CacheControlAdapter, self).send(request, **kw) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\requests\adapters.py", line 449, in send timeout=timeout File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\urllib3\connectionpool.py", line 696, in urlopen self._prepare_proxy(conn) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\urllib3\connectionpool.py", line 964, in _prepare_proxy conn.connect() File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\urllib3\connection.py", line 359, in connect conn = self._connect_tls_proxy(hostname, conn) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\urllib3\connection.py", line 506, in connect_tls_proxy ssl_context=ssl_context, File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\urllib3\util\ssl.py", line 453, in ssl_wrap_socket ssl_sock = ssl_wrap_socket_impl(sock, context, tls_in_tls) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\site-packages\pip_vendor\urllib3\util\ssl.py", line 495, in _ssl_wrap_socket_impl return ssl_context.wrap_socket(sock) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\ssl.py", line 407, in wrap_socket _context=self, _session=session) File "C:\AASoftwareLocation\anaconda\envs\env_pytorch\lib\ssl.py", line 773, in init raise ValueError("check_hostname requires server_hostname") ValueError: check_hostname requires server_hostname ''' What can i do to install pytorch in my computer.

ps:python=3.6.13