I finished installing pip on linux, the pip list
command works. But when using the pip install
command it got the following error:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/basecommand.py", line 232, in main
status = self.run(options, args)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/commands/install.py", line 339, in run
requirement_set.prepare_files(finder)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/req/req_set.py", line 333, in prepare_files
upgrade=self.upgrade,
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/index.py", line 305, in find_requirement
page = self._get_page(main_index_url, req)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/index.py", line 783, in _get_page
return HTMLPage.get_page(link, req, session=self.session)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/index.py", line 872, in get_page
"Cache-Control": "max-age=600",
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/sessions.py", line 473, in get
return self.request('GET', url, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/download.py", line 365, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/sessions.py", line 461, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/sessions.py", line 573, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/cachecontrol/adapter.py", line 43, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/adapters.py", line 370, in send
timeout=timeout
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 518, in urlopen
body=body, headers=headers)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 322, in _make_request
self._validate_conn(conn)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 727, in _validate_conn
conn.connect()
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/connection.py", line 238, in connect
ssl_version=resolved_ssl_version)
File "/usr/local/lib/python2.7/site-packages/pip-6.0.7-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py", line 254, in ssl_wrap_socket
return context.wrap_socket(sock)
File "/usr/local/lib/python2.7/ssl.py", line 350, in wrap_socket
_context=self)
File "/usr/local/lib/python2.7/ssl.py", line 537, in __init__
raise ValueError("check_hostname requires server_hostname")
ValueError: check_hostname requires server_hostname
How can I fix this?
pip 6.1.0 has been released, fixing this issue. You can upgrade with:
pip --trusted-host pypi.python.org install -U pip
to self-upgrade.
Original answer :
This is caused by a change in Python 2.7.9, which urllib3
needs to account for. See issue #543 for that project. Your OpenSSL libraries do not support SNI, which means urllib3
won't pass in the host name to the SSL socket wrapper, but Python 2.7.9 expects the hostname to be passed in anyway for different purposes.
urllib3
is indirectly used by requests
(see requests
issue 2435 ), which in turn is being used by pip
.
I've opened a ticket to track this from pip
's perspective .
The underlying issues have been fixed by the project maintainers, and awaiting a new release. You could install the current development version of pip
if you are impatient:
pip install --trusted-host=github.com -U https://github.com/pypa/pip/archive/develop.zip
This'll install pip-6.1.0.dev0, when 6.1.0 is fully released you can upgrade again with pip install -U pip
to get the final release from PyPI.
我遇到了同样的问题,并发现在我的情况下可以避免它(pip 6.0.8),如下所示
pip --trusted-host pypi.python.org install <thing>
It is related to urllib3. You can resolve it with urllib3 version 1.25.8. Download that version of urllib3 manually and install it.
Even though you install thia version, pip will still use its own version.So you have to remove it and replace it.
Usually, installed module is on PythonXX/Lib/site-packages
Delete urllib3 in PythonXX/Lib/site-packages/pip/_vendor
Move "PythonXX/Lib/site-packages/urllib3" to "PythonXX/Lib/site-packages/pip/_vendor".
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