title: Pip ERROR: ERROR: Exception: Traceback (most recent call last):
body: <p>Try to run <code>pip install requirements.txt</code> in code dir.
  CMD Returns:</p>
  <pre><code>ERROR: Exception:
  Traceback (most recent call last):
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\cli\base_command.py&quot;, line 173, in _main
      status = self.run(options, args)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\cli\req_command.py&quot;, line 203, in wrapper
      return func(self, options, args)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\commands\install.py&quot;, line 315, in run
      requirement_set = resolver.resolve(
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\resolution\resolvelib\resolver.py&quot;, line 94, in resolve
      result = self._result = resolver.resolve(
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\resolvelib\resolvers.py&quot;, line 472, in resolve
      state = resolution.resolve(requirements, max_rounds=max_rounds)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\resolvelib\resolvers.py&quot;, line 341, in resolve
      self._add_to_criteria(self.state.criteria, r, parent=None)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\resolvelib\resolvers.py&quot;, line 172, in _add_to_criteria
      if not criterion.candidates:
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\resolvelib\structs.py&quot;, line 151, in __bool__
      return bool(self._sequence)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py&quot;, line 140, in __bool__
      return any(self)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py&quot;, line 128, in &lt;genexpr&gt;
      return (c for c in iterator if id(c) not in self._incompatible_ids)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py&quot;, line 29, in _iter_built
      for version, func in infos:
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\resolution\resolvelib\factory.py&quot;, line 272, in iter_index_candidate_infos
      result = self._finder.find_best_candidate(
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\index\package_finder.py&quot;, line 851, in find_best_candidate
      candidates = self.find_all_candidates(project_name)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\index\package_finder.py&quot;, line 798, in find_all_candidates
      page_candidates = list(page_candidates_it)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\index\sources.py&quot;, line 134, in page_candidates
      yield from self._candidates_from_page(self._link)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\index\package_finder.py&quot;, line 758, in process_project_url
      html_page = self._link_collector.fetch_page(project_url)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\index\collector.py&quot;, line 490, in fetch_page
      return _get_html_page(location, session=self.session)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\index\collector.py&quot;, line 400, in _get_html_page
      resp = _get_html_response(url, session=session)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\index\collector.py&quot;, line 115, in _get_html_response
      resp = session.get(
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\requests\sessions.py&quot;, line 555, in get
      return self.request('GET', url, **kwargs)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_internal\network\session.py&quot;, line 454, in request
      return super().request(method, url, *args, **kwargs)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\requests\sessions.py&quot;, line 542, in request
      resp = self.send(prep, **send_kwargs)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\requests\sessions.py&quot;, line 655, in send
      r = adapter.send(request, **kwargs)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\cachecontrol\adapter.py&quot;, line 53, in send
      resp = super(CacheControlAdapter, self).send(request, **kw)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\requests\adapters.py&quot;, line 439, in send
      resp = conn.urlopen(
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\urllib3\connectionpool.py&quot;, line 696, in urlopen
      self._prepare_proxy(conn)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\urllib3\connectionpool.py&quot;, line 964, in _prepare_proxy
      conn.connect()
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\urllib3\connection.py&quot;, line 359, in connect
      conn = self._connect_tls_proxy(hostname, conn)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\urllib3\connection.py&quot;, line 500, in _connect_tls_proxy
      return ssl_wrap_socket(
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\urllib3\util\ssl_.py&quot;, line 453, in ssl_wrap_socket
      ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\site-packages\pip\_vendor\urllib3\util\ssl_.py&quot;, line 495, in _ssl_wrap_socket_impl
      return ssl_context.wrap_socket(sock)
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\ssl.py&quot;, line 512, in wrap_socket
      return self.sslsocket_class._create(
    File &quot;C:\Users\Thishakya\AppData\Local\Programs\Python\Python310\lib\ssl.py&quot;, line 1027, in _create
      raise ValueError(&quot;check_hostname requires server_hostname&quot;)
  ValueError: check_hostname requires server_hostname
  </code></pre>
  <p>I cannot install any pip package in my pc it returns that error .I am using <code>v2ray</code> and <code>proxyfire</code>.I don't think these software make trouble with pip command  because I use it without any error before formatting my PC.</p>
  <p>I already installed Python and added into env var : <code>Python 3.10.1</code></p>
  <p>Appreciate Your support .</p>