conda updating anaconda failure

[javierj]

After

conda update conda

I tried to update Anaconda too. this is the result:

conda update anaconda
Fetching package metadata ...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 : win-64
      conda version : 4.2.12
   conda is private : False
  conda-env version : 4.2.12
conda-build version : 1.18.2
     python version : 3.5.2.final.0
   requests version : 2.12.1
   root environment : C:\code\apps\Anaconda3  (writable)
default environment : C:\code\apps\Anaconda3
   envs directories : C:\code\apps\Anaconda3\envs
      package cache : C:\code\apps\Anaconda3\pkgs
       channel URLs : https://repo.continuum.io/pkgs/free/win-64
                      https://repo.continuum.io/pkgs/free/noarch
                      https://repo.continuum.io/pkgs/pro/win-64
                      https://repo.continuum.io/pkgs/pro/noarch
                      https://repo.continuum.io/pkgs/msys2/win-64
                      https://repo.continuum.io/pkgs/msys2/noarch
        config file : None
       offline mode : False

$ C:\code\apps\Anaconda3\Scripts\conda-script.py update anaconda

Traceback (most recent call last):
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\exceptions.py", line 479, in conda_exception_handler
    return_value = func(*args, **kwargs)
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\cli\main.py", line 145, in _main
    exit_code = args.func(args, p)
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\cli\main_update.py", line 65, in execute
    install(args, parser, 'update')
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\cli\install.py", line 238, in install
    prefix=prefix)
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\api.py", line 24, in get_index
    index = fetch_index(channel_urls, use_cache=use_cache, unknown=unknown)
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\fetch.py", line 310, in fetch_index
    repodatas = [(u, f.result()) for u, f in zip(urls, futures)]
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\fetch.py", line 310, in <listcomp>
    repodatas = [(u, f.result()) for u, f in zip(urls, futures)]
  File "C:\code\apps\Anaconda3\lib\concurrent\futures\_base.py", line 405, in result
    return self.__get_result()
  File "C:\code\apps\Anaconda3\lib\concurrent\futures\_base.py", line 357, in __get_result
    raise self._exception
  File "C:\code\apps\Anaconda3\lib\concurrent\futures\thread.py", line 55, in run
    result = self.fn(*self.args, **self.kwargs)
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\fetch.py", line 74, in func
    res = f(*args, **kwargs)
  File "C:\code\apps\Anaconda3\lib\site-packages\conda\fetch.py", line 116, in fetch_repodata
    timeout=(3.05, 60))
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\sessions.py", line 501, in get
    return self.request('GET', url, **kwargs)
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\sessions.py", line 488, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\sessions.py", line 609, in send
    r = adapter.send(request, **kwargs)
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\adapters.py", line 423, in send
    timeout=timeout
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 594, in urlopen
    chunked=chunked)
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 350, in _make_request
    self._validate_conn(conn)
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\packages\urllib3\connectionpool.py", line 835, in _validate_conn
    conn.connect()
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\packages\urllib3\connection.py", line 330, in connect
    cert = self.sock.getpeercert()
  File "C:\code\apps\Anaconda3\lib\site-packages\requests\packages\urllib3\contrib\pyopenssl.py", line 324, in getpeercert
    'subjectAltName': get_subj_alt_name(x509)
  File "C:\code\apps\Anaconda3\lib\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'

I have the same error if I try to update conda itself

[OliverChow]

I also came across this problem, exactly the same as you, I have reinstalled my ubuntu system for at least 5 times, but it just didn't work, I am so depressed now.....

[kalefranz]

Duplicate of #3929, #3935, and #3934. Honestly not sure where this came from all the sudden. We definitely need to limit dependencies somewhere.

In general pyopenssl and cryptography are out of sync.

CONDA_VERIFY_SSL=false conda update pyopenssl

should fix your problem

Edit:

CONDA_VERIFY_SSL=false is WRONG

Please use

CONDA_SSL_VERIFY=false conda update pyopenssl

I feel bad. Sincere apologies for the confusion and frustration.

[PymatFlow]

Hello Friends
I have solved the problem.

This error cause because of different version of python in anaconda and installed python on your system.

when you upgrade anaconda to new version, It has been written in newest version on pyhton (3.6 for me) but i have installed lower version (3.5 for me) of python in my system, so it cause fail in run.

so download newest version of python and install it, then
rename folder of last python to a different name such as "pythoonn"

then conda command will works.

[github-actions]

Hi there, thank you for your contribution to Conda!

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