1.更新conda：conda update -n base conda 更新第一遍，发现并不是最新版本，继续更新，再执行一遍
2.第二次更新conda：conda update -n base conda 第二次的时候时间会比较长，等着就行了，更新完之后，做什么都方便

摘抄自https://blog.csdn.net/the_time_runner/article/details/99848728

遇到一个报错：failed with initial frozen solve. Retrying with flexible solve.

根据网上教程，先更新conda。

在Anaconda prompt 输入conda update，提示：

conda update --prefix C:\Anaconda3 anaconda

按这条命令，更新conda环境。会更新非常多的包。更新完成后输入：

conda update --all

Anaconda通过conda update conda更新以后创建新环境，安装模块报错问题

有个包一直安不上，以为是Anaconda版本太久了，就用下面命令更新了一下

conda update conda

更新完conda不能正常使用了，发生了创建新环境和安装模块就会报错的情况

部分报错截图(完整报错点击这里)

报错开头

报错末尾

解决办法

1. 重装肯定是最简单的解决办法，但是那么多环境，都是好不容易配出来的，再配一次我能气到把键盘吃掉

2. github/conda给出的一个方法，把conda回退到旧的可以用的版本

   conda config --set allow_conda_downgrades true
   conda install conda=4.6.14
   

   很多人好评

3. 我试了一下，没有用，循环报错，install再次报错

   我需要正常的conda，但是没有正常的conda不能安装正常的conda

   所以，我到独立的正常conda可执行文件下载了一个win版本的可执行文件

   用可执行文件安装旧版本conda

   <executable path> install -p <path to broken installation> conda=4.6.14
   

   举个栗子，我是这样输入的

   

问题解决了，conda又能用了，这应该是最新版本conda 4.8的一个bug

完整的报错

Loading channels: failed

# >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<<<<<

    Traceback (most recent call last):
      File "E:\Anaconda3\lib\site-packages\conda\gateways\connection\session.py", line 60,
 in __call__
        return cls._thread_local.session
    AttributeError: '_thread._local' object has no attribute 'session'

    During handling of the above exception, another exception occurred:

    Traceback (most recent call last):
      File "E:\Anaconda3\lib\site-packages\conda\exceptions.py", line 1079, in __call__
        return func(*args, **kwargs)
      File "E:\Anaconda3\lib\site-packages\conda\cli\main.py", line 84, in _main
        exit_code = do_call(args, p)
      File "E:\Anaconda3\lib\site-packages\conda\cli\conda_argparse.py", line 83, in do_ca
ll
        return getattr(module, func_name)(args, parser)
      File "E:\Anaconda3\lib\site-packages\conda\cli\main_search.py", line 73, in execute
        matches = sorted(SubdirData.query_all(spec, channel_urls, subdirs),
      File "E:\Anaconda3\lib\site-packages\conda\core\subdir_data.py", line 105, in query_
all
        result = tuple(concat(executor.map(subdir_query, channel_urls)))
      File "E:\Anaconda3\lib\concurrent\futures\_base.py", line 586, in result_iterator
        yield fs.pop().result()
      File "E:\Anaconda3\lib\concurrent\futures\_base.py", line 425, in result
        return self.__get_result()
      File "E:\Anaconda3\lib\concurrent\futures\_base.py", line 384, in __get_result
        raise self._exception
      File "E:\Anaconda3\lib\concurrent\futures\thread.py", line 57, in run
        result = self.fn(*self.args, **self.kwargs)
      File "E:\Anaconda3\lib\site-packages\conda\core\subdir_data.py", line 98, in <lambda
>
        package_ref_or_match_spec))
      File "E:\Anaconda3\lib\site-packages\conda\core\subdir_data.py", line 110, in query
        self.load()
      File "E:\Anaconda3\lib\site-packages\conda\core\subdir_data.py", line 174, in load
        _internal_state = self._load()
      File "E:\Anaconda3\lib\site-packages\conda\core\subdir_data.py", line 248, in _load
        repodata_fn=self.repodata_fn)
      File "E:\Anaconda3\lib\site-packages\conda\core\subdir_data.py", line 470, in fetch_
repodata_remote_request
        session = CondaSession()
      File "E:\Anaconda3\lib\site-packages\conda\gateways\connection\session.py", line 62,
 in __call__
        session = cls._thread_local.session = super(CondaSessionType, cls).__call__()
      File "E:\Anaconda3\lib\site-packages\conda\gateways\connection\session.py", line 88,
 in __init__
        raise_on_status=False)
    TypeError: __init__() got an unexpected keyword argument 'raise_on_status'

`$ E:\Anaconda3\Scripts\conda-script.py search conda`

  environment variables:
                 CIO_TEST=<not set>
                CLASSPATH=.;E:\jdk1.7\lib;E:\jdk1.7\lib\tools.jar
                CONDA_EXE=E:\Anaconda3\condabin\..\Scripts\conda.exe
               CONDA_EXES="E:\Anaconda3\condabin\..\Scripts\conda.exe"
               CONDA_ROOT=E:\Anaconda3
           CURL_CA_BUNDLE=<not set>
                 HOMEPATH=\Users\Administrator
                     PATH=E:\Anaconda3;E:\Anaconda3\Library\mingw-w64\bin;E:\Anaconda3\Lib
rary\u
                          sr\bin;E:\Anaconda3\Library\bin;E:\Anaconda3\Scripts;E:\Anaconda
3\bin;
                          E:\Anaconda3;E:\Anaconda3\Library\mingw-w64\bin;E:\Anaconda3\Lib
rary\u
                          sr\bin;E:\Anaconda3\Library\bin;E:\Anaconda3\Scripts;C:\Program
                          Files\Microsoft MPI\Bin\;C:\ProgramData\Oracle\Java\javapath;C:\
Window
                          s\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System
32\Win
                          dowsPowerShell\v1.0\;E:\adb;E:\tesseract\Tesseract-OCR;C:\Progra
m
                          Files\dotnet\;C:\Program Files\Microsoft SQL
                          Server\130\Tools\Binn\;C:\Program Files\nodejs\;C:\Program
                          Files\Microsoft SQL Server\120\DTS\Binn\;C:\Program Files\Micros
oft
                          SQL Server\Client SDK\ODBC\110\Tools\Binn\;C:\Program Files
                          (x86)\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files\Micr
osoft
                          SQL Server\120\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL
                          Server\120\Tools\Binn\ManagementStudio\;C:\Program Files
                          (x86)\Microsoft SQL Server\120\DTS\Binn\;E:\tomcat\apache-tomcat
-7.0.9
                          1\bin;E:\jdk1.7\bin;%JAVA%\bin;%JAVA%\jre\bin;E:\svn\bin;E:\AS\S
DK\pla
                          tform-tools;E:\Git\cmd;E:\bvsshClient;E:\MiKTeX\MiKTeX
                          2.9\miktex\bin\x64\;E:\Sumatra PDF\SumatraPDF;E:\winscp\WinSCP\;
C:\Use
                          rs\Administrator\AppData\Local\Programs\Python\Python36\Scripts\
;C:\Us
                          ers\Administrator\AppData\Local\Programs\Python\Python36\;C:\Pro
gram
                          Files (x86)\Microsoft Visual Studio\Common\Tools\WinNT;C:\Progra
m
                          Files (x86)\Microsoft Visual Studio\Common\MSDev98\Bin;C:\Progra
m
                          Files (x86)\Microsoft Visual Studio\Common\Tools;C:\Program File
s
                          (x86)\Microsoft Visual Studio\VC98\bin;E:\tesseract\Tesseract-OC
R;C:\U
                          sers\Administrator\AppData\Roaming\npm;C:\Users\Administrator\Ap
pData\
                          Local\GitHubDesktop\bin;E:\jdk1.7\bin;E:\jdk1.7\jre\bin;E:\apach
e-
                          maven-3.6.0\bin;E:\sqlite;E:\Anaconda3\Library\bin;;E:\Pycharm\P
yCharm
                          2020.1.1\bin;
             PSMODULEPATH=C:\Windows\system32\WindowsPowerShell\v1.0\Modules\;C:\Program F
iles
                          (x86)\Microsoft SQL Server\120\Tools\PowerShell\Modules\
       REQUESTS_CA_BUNDLE=<not set>
            SSL_CERT_FILE=<not set>

     active environment : None
       user config file : C:\Users\Administrator\.condarc
 populated config files : C:\Users\Administrator\.condarc
          conda version : 4.8.5
    conda-build version : 3.17.6
         python version : 3.7.1.final.0
       virtual packages :
       base environment : E:\Anaconda3  (writable)
           channel URLs : https://mirrors.ustc.edu.cn/anaconda/pkgs/free/win-64
                          https://mirrors.ustc.edu.cn/anaconda/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : E:\Anaconda3\pkgs
                          C:\Users\Administrator\.conda\pkgs
                          C:\Users\Administrator\AppData\Local\conda\conda\pkgs
       envs directories : E:\Anaconda3\envs
                          C:\Users\Administrator\.conda\envs
                          C:\Users\Administrator\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/4.8.5 requests/2.7.0 CPython/3.7.1 Windows/7 Windows/6.1.7
601
          administrator : True
             netrc file : None
           offline mode : False


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[y/N]: n

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    $ conda config --set report_errors false