python-3.x - pip3 package 安装失败，出现 *ReadTimeoutError*，无论默认超时设置如何

问题

在ufw处于非活动状态的全新且最小的 Ubuntu 20.04 安装中：

pip3因 HTTPSConnectionPool 超时而失败。

pip3无法在新安装的操作系统中安装或更新任何package。

安装本地 Wheel 文件时pip3失败并出现同样的错误。

pip3在虚拟 python 环境和系统级环境中均失败。

额外细节

--默认超时=100

--默认超时=1000

更新：

用户中断后的回溯python -m pip install -U pip

^CERROR: Operation cancelled by user ^CTraceback (most recent call last): File "/usr/lib/python3.8/runpy.py", line 194, in _run_module_as_main return _run_code(code, main_globals, None, File "/usr/lib/python3.8/runpy.py", line 87, in _run_code exec(code, run_globals) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/__main__.py", line 26, in <module> sys.exit(_main()) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/cli/main.py", line 75, in main return command.main(cmd_args) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/cli/base_command.py", line 114, in main return self._main(args) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/cli/base_command.py", line 226, in _main self.handle_pip_version_check(options) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/cli/req_command.py", line 158, in handle_pip_version_check pip_self_version_check(session, options) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/self_outdated_check.py", line 207, in pip_self_version_check best_candidate = finder.find_best_candidate("pip").best_candidate File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/index/package_finder.py", line 883, in find_best_candidate candidates = self.find_all_candidates(project_name) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/index/package_finder.py", line 827, in find_all_candidates package_links = self.process_project_url( File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/index/package_finder.py", line 792, in process_project_url html_page = self._link_collector.fetch_page(project_url) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/index/collector.py", line 612, in fetch_page return _get_html_page(location, session=self.session) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/index/collector.py", line 451, in _get_html_page resp = _get_html_response(url, session=session) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/index/collector.py", line 149, in _get_html_response resp = session.get( File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py", line 543, in get return self.request('GET', url, **kwargs) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_internal/network/session.py", line 421, in request return super(PipSession, self).request(method, url, *args, **kwargs) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py", line 530, in request resp = self.send(prep, **send_kwargs) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py", line 643, in send r = adapter.send(request, **kwargs) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/cachecontrol/adapter.py", line 53, in send resp = super(CacheControlAdapter, self).send(request, **kw) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/requests/adapters.py", line 439, in send resp = conn.urlopen( File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/urllib3/connectionpool.py", line 665, in urlopen httplib_response = self._make_request( File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/urllib3/connectionpool.py", line 376, in _make_request self._validate_conn(conn) File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/urllib3/connectionpool.py", line 994, in _validate_conn conn.connect() File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/urllib3/connection.py", line 352, in connect self.sock = ssl_wrap_socket( File "/home/zippy/Documents/python_workspace/py_virt_env/lib/python3.8/site-packages/pip/_vendor/urllib3/util/ssl_.py", line 370, in ssl_wrap_socket return context.wrap_socket(sock, server_hostname=server_hostname) File "/usr/lib/python3.8/ssl.py", line 500, in wrap_socket return self.sslsocket_class._create( File "/usr/lib/python3.8/ssl.py", line 1040, in _create self.do_handshake() File "/usr/lib/python3.8/ssl.py", line 1309, in do_handshake self._sslobj.do_handshake() KeyboardInterrupt

更新

健全性检查 - 好的

laptop082:468$ curl https://pypi.org:443/simple/pip/ <!DOCTYPE html> <html> <head> <meta name="pypi:repository-version" content="1.0"> <title>Links for pip</title> </head> <body> <h1>Links for pip</h1> <a href="https://files.pythonhosted.org/packages/3d/9d/1e313763bdfb6a48977b65829c6ce2a43eaae29ea2f907c8bbef024a7219/pip-0.2.tar.gz#sha256=88bb8d029e1bf4acd0e04d300104b7440086f94cc1ce1c5c3c31e3293aee1f81">pip-0.2.tar.gz</a><br/> . . .