python - 如何删除 Conda 中的 channel ？

Question

如何删除 channel ，或者至少指示 Conda 在 channel URL 之一出现故障时不中止？

我正在测试一个有问题的工具，它在 https://www.idiap.ch/software/bob/conda/linux-64 提供了一个 Conda repo 协议(protocol)，但现在该 repo 协议(protocol)已离线，现在所有对 conda create --prefix=./cenv -y python=3.7 的调用都失败并显示消息:

Collecting package metadata (current_repodata.json): failed

CondaHTTPError: HTTP 503 SERVICE UNAVAILABLE for url <https://www.idiap.ch/software/bob/conda/linux-64/current_repodata.json>
Elapsed: 00:02.470723

A remote server error occurred when trying to retrieve this URL.

A 500-type error (e.g. 500, 501, 502, 503, etc.) indicates the server failed to
fulfill a valid request.  The problem may be spurious, and will resolve itself if you
try your request again.  If the problem persists, consider notifying the maintainer
of the remote server.

我没有在我的创建命令中使用这个 channel ，所以我不知道为什么 Conda 会失败而不是忽略它。我如何允许 Conda 继续或清除 channel ？

我尝试通过运行删除 channel :

conda config --remove channels https://www.idiap.ch/software/bob/conda

输出错误:

CondaKeyError: 'channels': 'https://www.idiap.ch/software/bob/conda' is not in the 'channels' key of the config file

编辑:我的 conda 信息 是:

     active environment : None
            shell level : 0
       user config file : /home/myuser/.condarc
 populated config files : /home/myuser/miniconda3/.condarc
                          /home/myuser/.condarc
          conda version : 4.7.12
    conda-build version : not installed
         python version : 3.7.3.final.0
       virtual packages : 
       base environment : /home/myuser/miniconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://www.idiap.ch/software/bob/conda/linux-64
                          https://www.idiap.ch/software/bob/conda/noarch
          package cache : /home/myuser/miniconda3/pkgs
                          /home/myuser/.conda/pkgs
       envs directories : /home/myuser/miniconda3/envs
                          /home/myuser/.conda/envs
               platform : linux-64
             user-agent : conda/4.7.12 requests/2.22.0 CPython/3.7.3 Linux/4.15.0-64-generic ubuntu/18.04.3 glibc/2.27
                UID:GID : 1000:1000
             netrc file : None
           offline mode : False

运行:

conda config --remove channels https://www.idiap.ch/software/bob/conda/linux-64
conda config --remove channels https://www.idiap.ch/software/bob/conda/noarch

输出错误:

CondaKeyError: 'channels': 'https://www.idiap.ch/software/bob/conda/<name>' is not in the 'channels' key of the config file

这些是我的 .condarc 的内容:

$ cat ~/.condarc 
show_channel_urls: true
auto_activate_base: false
channels:
  - defaults

Answer 1

conda config --remove channels https://www.idiap.ch/software/bob/conda

在我的测试中有效。

另一种方法是打开$HOME目录下的.condarc文件，然后注释掉相应的 channel 行。