python - 如何解决传递依赖冲突问题？

Question

我用 pipenv命令在我的 Python 虚拟环境中安装包。
我需要更新版本的 pandas .所以我安装成功:

pipenv install pandas~=1.0

然后我安装了 Apache Beam:

pipenv install apache-beam[gcp,test]

这安装了 Apache Beam 但给了我一个错误:

[pipenv.exceptions.ResolutionFailure]: Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.

  First try clearing your dependency cache with $ pipenv lock --clear, then try the original command again.
 Alternatively, you can use $ pipenv install --skip-lock to bypass this mechanism, then run $ pipenv graph to inspect the situation.
  Hint: try $ pipenv lock --pre if it is a pre-release dependency.
ERROR: ERROR: Could not find a version that matches pandas<0.25,>=0.23.4,~=1.0
...
There are incompatible versions in the resolved dependencies.

它降级了我的 pandas版本到 0.24.2这不支持我需要的东西。
我该如何解决这个问题？
谢谢

Answer 1

尝试通过运行以下命令清除锁定文件中的缓存:

$ pipenv lock --pre --clear

看看以后能不能安装。
如果出现错误，请尝试:

$ pipenv lock --clear