Python pip安装paho mqtt回溯（最近一次调用）

关于泛美卫生组织mqtt，我有一个问题要问。每当我试图安装

sudo pip install paho-mqtt

结果会是这样的

Collecting paho-mqtt

Exception:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 353, in run
    wb.build(autobuilding=True)
  File "/usr/lib/python2.7/dist-packages/pip/wheel.py", line 749, in build
    self.requirement_set.prepare_files(self.finder)
  File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 554, in _prepare_file
    require_hashes
  File "/usr/lib/python2.7/dist-packages/pip/req/req_install.py", line 278, in populate_link
    self.link = finder.find_requirement(self, upgrade)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 465, in find_requirement
    all_candidates = self.find_all_candidates(req.name)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 423, in find_all_candidates
    for page in self._get_pages(url_locations, project_name):
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 568, in _get_pages
    page = self._get_page(location)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 683, in _get_page
    return HTMLPage.get_page(link, session=self.session)
  File "/usr/lib/python2.7/dist-packages/pip/index.py", line 792, in get_page
    "Cache-Control": "max-age=600",
  File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py", line 501, in get
    return self.request('GET', url, **kwargs)
  File "/usr/lib/python2.7/dist-packages/pip/download.py", line 386, in request
    return super(PipSession, self).request(method, url, *args, **kwargs)
  File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py", line 488, in request
    resp = self.send(prep, **send_kwargs)
  File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/sessions.py", line 609, in send
    r = adapter.send(request, **kwargs)
  File "/usr/share/python-wheels/CacheControl-0.11.7-py2.py3-none-any.whl/cachecontrol/adapter.py", line 47, in send
    resp = super(CacheControlAdapter, self).send(request, **kw)
  File "/usr/share/python-wheels/requests-2.12.4-py2.py3-none-any.whl/requests/adapters.py", line 423, in send
    timeout=timeout
  File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 594, in urlopen
    chunked=chunked)
  File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 350, in _make_request
    self._validate_conn(conn)
  File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 837, in _validate_conn
    conn.connect()
  File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/connection.py", line 323, in connect
    ssl_context=context)
  File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/util/ssl_.py", line 308, in ssl_wrap_socket
    context.load_verify_locations(ca_certs, ca_cert_dir)
  File "/usr/share/python-wheels/urllib3-1.19.1-py2.py3-none-any.whl/urllib3/contrib/pyopenssl.py", line 392, in load_verify_locations
    self._ctx.load_verify_locations(cafile, capath)
  File "/usr/lib/python2.7/dist-packages/OpenSSL/SSL.py", line 525, in load_verify_locations
    _raise_current_error()
  File "/usr/lib/python2.7/dist-packages/OpenSSL/_util.py", line 48, in exception_from_error_queue
    raise exception_type(errors)
Error: []

我试过这个方法

cd /usr/lib/python2.7/dist-packages

sudo ln -s /home/pi/.local/lib/python2.7/site-packages/paho

---

但它仍然显示出同样的问题。这个问题已经发生了很长一段时间，我用各种解决方案做了很多研究，但问题仍然是一样的。显然，任何关于pip安装的事情我都会面临回溯问题。我真的需要一些帮助。谢谢大家!

前几天我也犯了同样的错误。 您应该在安装

paho mqtt

之前尝试此操作

pip安装--升级setuptools

请让我知道它是否有效

---

有关更多信息，请转到

我设法解决了一个问题，即我的操作系统安装出现问题，我以前使用的是NOOBS，现在我尝试安装“Raspbian Stretch with desktop”的操作系统，现在它工作得非常好

你应该发布完整的回溯。最后最重要的部分缺失了。我想，但stackoverflow不允许我说我的帖子包含太多代码，然后不允许我发布。显然，是我的操作系统有问题，因为所有与pip相关的安装都存在回溯问题，重新安装后现在可以正常工作。无论如何，谢谢你的帮助！