面临更新Python的问题

Question

我需要在python中添加这个包，但是每当我尝试使用

conda install -c conda-forge python-ternary

上面说

Solving environment: failed

InvalidVersionSpecError: Invalid version spec: =2.7

然后，我有一个更新Conda的弹出窗口，所以我通过

conda update conda

尽管如此，错误仍然存在

InvalidVersionSpecError: Invalid version spec: =2.7

即使我从导航器手动执行此操作，错误仍保持不变。 我还尝试通过删除所有缓存

conda clean --index-cache

即使在那之后，我也会犯同样的错误。 请帮忙！ 我的康达规范

conda version
4.5.12

conda info
 active environment : base
    active env location : /home/masoom/anaconda3
            shell level : 1
       user config file : /home/masoom/.condarc
 populated config files : /home/masoom/.condarc
          conda version : 4.5.12
    conda-build version : 3.17.6
         python version : 3.7.1.final.0
       base environment : /home/masoom/anaconda3  (writable)
           channel URLs : https://conda.anaconda.org/conda-forge/linux-64
                          https://conda.anaconda.org/conda-forge/noarch
                          https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/linux-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/linux-64
                          https://repo.anaconda.com/pkgs/pro/noarch
          package cache : /home/masoom/anaconda3/pkgs
                          /home/masoom/.conda/pkgs
       envs directories : /home/masoom/anaconda3/envs
                          /home/masoom/.conda/envs
               platform : linux-64
             user-agent : conda/4.5.12 requests/2.21.0 CPython/3.7.1 Linux/4.4.0-203-generic ubuntu/16.04 glibc/2.23
                UID:GID : 1001:1001
             netrc file : None
           offline mode : False