Пип с использованием прокси, даже если прокси отключен

Question

Итак, я управляю своим компьютером в сети колледжа, используя прокси-сервер. Поэтому для использования pip я много чего пробовал для реализации туннелирования прокси для pypip. Но я продолжал получать такую ​​же ошибку, поэтому я попытался удалить прокси, подключиться к Wi-Fi не из колледжа и повторить попытку. Но почему-то снова и снова используется один и тот же прокси-адрес, хотя я отключил прокси в настройках прокси-сервера Windows.

    Exception:
    Traceback (most recent call last):
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\cli\base_command.py", l
    ine 179, in main
        status = self.run(options, args)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\commands\install.py", l
    ine 315, in run
        resolver.resolve(requirement_set)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\resolve.py", line 131,
    in resolve
        self._resolve_one(requirement_set, req)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\resolve.py", line 294,
    in _resolve_one
        abstract_dist = self._get_abstract_dist_for(req_to_install)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\resolve.py", line 242,
    in _get_abstract_dist_for
        self.require_hashes
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\operations\prepare.py",
     line 269, in prepare_linked_requirement
        req.populate_link(finder, upgrade_allowed, require_hashes)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\req\req_install.py", li
    ne 196, in populate_link
        self.link = finder.find_requirement(self, upgrade)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\index.py", line 639, in
     find_requirement
        all_candidates = self.find_all_candidates(req.name)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\index.py", line 610, in
     find_all_candidates
        for page in self._get_pages(url_locations, project_name):
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\index.py", line 743, in
     _get_pages
        page = _get_html_page(location, session=self.session)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\index.py", line 229, in
     _get_html_page
        resp = _get_html_response(url, session=session)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\index.py", line 177, in
     _get_html_response
        "Cache-Control": "max-age=0",
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\requests\sessions.py", li
    ne 546, in get
        return self.request('GET', url, **kwargs)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_internal\download.py", line 403,
     in request
        return super(PipSession, self).request(method, url, *args, **kwargs)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\requests\sessions.py", li
    ne 533, in request
        resp = self.send(prep, **send_kwargs)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\requests\sessions.py", li
    ne 646, in send
        r = adapter.send(request, **kwargs)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\cachecontrol\adapter.py",
     line 53, in send
        resp = super(CacheControlAdapter, self).send(request, **kw)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\requests\adapters.py", li
    ne 412, in send
        conn = self.get_connection(request.url, proxies)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\requests\adapters.py", li
    ne 309, in get_connection
        proxy_manager = self.proxy_manager_for(proxy)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\requests\adapters.py", li
    ne 199, in proxy_manager_for
        **proxy_kwargs)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\urllib3\poolmanager.py",
    line 450, in proxy_from_url
        return ProxyManager(proxy_url=url, **kw)
      File "c:\users\deepa\appdata\local\programs\python\python37-32\lib\site-packages\pip_vendor\urllib3\poolmanager.py",
    line 401, in init
        raise ProxySchemeUnknown(proxy.scheme)
    pip._vendor.urllib3.exceptions.ProxySchemeUnknown: Not supported proxy scheme adityaga