Python 2.7 为什么在尝试使用conda安装PyODBC时会出现无法满足的错误？

我正在尝试安装PyODBC包，但遇到错误：

(base) C:\>conda install -c zegami pypyodbc
Solving environment: failed

UnsatisfiableError: The following specifications were found to be in conflict:
  - backports.functools_lru_cache
  - pypyodbc
Use "conda info <package>" to see the dependencies for each package.

---

你可能需要递归地追踪它。首先，执行conda info pypyobdc（可能包括任何通道）并写下所有依赖项及其版本。然后，对

backports.functools\u lru\u cache

执行相同的操作，然后对其每个依赖项和这些依赖项执行相同的操作，依此类推。通常你会很快发现冲突。谢谢，这很有帮助。我真的很感激。我会这么做，然后再报告！

(base) C:\>conda info

     active environment : base
    active env location : C:\ProgramData\Anaconda2
            shell level : 1
       user config file : C:\Users\braddavi\.condarc
 populated config files : C:\Users\braddavi\.condarc
          conda version : 4.5.4
    conda-build version : 3.10.5
         python version : 2.7.15.final.0
       base environment : C:\ProgramData\Anaconda2  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/win-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/win-64
                          https://repo.anaconda.com/pkgs/pro/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\ProgramData\Anaconda2\pkgs
                          C:\Users\braddavi\AppData\Local\conda\conda\pkgs
       envs directories : C:\ProgramData\Anaconda2\envs
                          C:\Users\braddavi\AppData\Local\conda\conda\envs
                          C:\Users\braddavi\.conda\envs
               platform : win-64
             user-agent : conda/4.5.4 requests/2.18.4 CPython/2.7.15 Windows/201
2ServerR2 Windows/6.3.9600
          administrator : True
             netrc file : None
           offline mode : False


(base) C:\>