问题
I am trying to install seaborn on anaconda on Ubuntu-Linux.
conda install -c anaconda seaborn=0.7.1
I am getting the following error message:
Fetching package metadata .../home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connection.py:337: SubjectAltNameWarning: Certificate for conda.anaconda.org has no `subjectAltName`, falling back to check for a `commonName` for now. This feature is being removed by major browsers and deprecated by RFC 2818. (See https://github.com/shazow/urllib3/issues/497 for details.)
SubjectAltNameWarning
/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connection.py:337: SubjectAltNameWarning: Certificate for conda.anaconda.org has no `subjectAltName`, falling back to check for a `commonName` for now. This feature is being removed by major browsers and deprecated by RFC 2818. (See https://github.com/shazow/urllib3/issues/497 for details.)
SubjectAltNameWarning
..An unexpected error has occurred.
Please consider posting the following information to the
conda GitHub issue tracker at:
https://github.com/conda/conda/issues
Current conda install:
platform : linux-64
conda version : 4.2.12
conda is private : False
conda-env version : 4.2.12
conda-build version : 1.19.0
python version : 3.5.2.final.0
requests version : 2.12.1
root environment : /home/moritz/Python/anaconda3 (writable)
default environment : /home/moritz/Python/anaconda3
envs directories : /home/moritz/Python/anaconda3/envs
package cache : /home/moritz/Python/anaconda3/pkgs
channel URLs : https://repo.continuum.io/pkgs/free/linux-64
https://repo.continuum.io/pkgs/free/noarch
https://repo.continuum.io/pkgs/pro/linux-64
https://repo.continuum.io/pkgs/pro/noarch
config file : None
offline mode : False
When I run
$ /home/moritz/Python/anaconda3/bin/conda install -c anaconda seaborn=0.7.1
I am getting the following error message:
Traceback (most recent call last):
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/exceptions.py", line 479, in conda_exception_handler
return_value = func(*args, **kwargs)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/cli/main.py", line 145, in _main
exit_code = args.func(args, p)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/cli/main_install.py", line 80, in execute
install(args, parser, 'install')
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/cli/install.py", line 238, in install
prefix=prefix)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/api.py", line 24, in get_index
index = fetch_index(channel_urls, use_cache=use_cache, unknown=unknown)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/fetch.py", line 310, in fetch_index
repodatas = [(u, f.result()) for u, f in zip(urls, futures)]
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/fetch.py", line 310, in <listcomp>
repodatas = [(u, f.result()) for u, f in zip(urls, futures)]
File "/home/moritz/Python/anaconda3/lib/python3.5/concurrent/futures/_base.py", line 398, in result
return self.__get_result()
File "/home/moritz/Python/anaconda3/lib/python3.5/concurrent/futures/_base.py", line 357, in __get_result
raise self._exception
File "/home/moritz/Python/anaconda3/lib/python3.5/concurrent/futures/thread.py", line 55, in run
result = self.fn(*self.args, **self.kwargs)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/fetch.py", line 74, in func
res = f(*args, **kwargs)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/conda/fetch.py", line 116, in fetch_repodata
timeout=(3.05, 60))
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/sessions.py", line 501, in get
return self.request('GET', url, **kwargs)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/sessions.py", line 488, in request
resp = self.send(prep, **send_kwargs)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/sessions.py", line 609, in send
r = adapter.send(request, **kwargs)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/adapters.py", line 423, in send
timeout=timeout
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connectionpool.py", line 594, in urlopen
chunked=chunked)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connectionpool.py", line 350, in _make_request
self._validate_conn(conn)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connectionpool.py", line 835, in _validate_conn
conn.connect()
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/connection.py", line 330, in connect
cert = self.sock.getpeercert()
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/contrib/pyopenssl.py", line 324, in getpeercert
'subjectAltName': get_subj_alt_name(x509)
File "/home/moritz/Python/anaconda3/lib/python3.5/site-packages/requests/packages/urllib3/contrib/pyopenssl.py", line 171, in get_subj_alt_name
ext = cert.extensions.get_extension_for_class(
AttributeError: 'Extensions' object has no attribute 'get_extension_for_class'`
Any idea what the issue could be here? Many thanks in advance.
回答1:
please see here: https://github.com/conda/conda/issues/3929
The issue was an old version of the cryptography package. It could be fixed by running:
CONDA_SSL_VERIFY=false conda update pyopenssl
回答2:
Another way to disable verification of SSL certificates that will work on Windows as well:
add ssl_verify: False to .condarc file.
.condarc file is not included by default, but it is automatically created in the user’s home directory the first time you run the conda config command.
To set ssl_verify the following command can be used:
conda config --set ssl_verify False.
来源：https://stackoverflow.com/questions/40748838/problems-with-updating-anaconda-and-installing-new-packages