显示conda托管环境的顶级依赖关系 [英] Show top level dependencies for a conda managed environment

问题描述

作为一个例子，如果我创建了一个新环境.

Just as an example, if I created a new environment.

conda install python
conda create --name foo_environment
conda activate foo_environment
conda install python
conda install jupyter
conda env export > environment.yml

很显然，在这种情况下，在此环境中仅添加了两个顶级依赖项:python和Jupiter.

Very obviously, in this case, there are only two top-level dependencies that are added in this environment: python and Jupiter.

我知道我们可以根据但是看看它有多详细.

name: foo_environment
channels:
  - defaults
  - conda-forge
dependencies:
  - appnope=0.1.0=py37_0
  - attrs=19.1.0=py37_1
  - backcall=0.1.0=py37_0
  - bleach=3.1.0=py37_0
  - ca-certificates=2019.5.15=0
  - certifi=2019.3.9=py37_0
  - dbus=1.13.6=h90a0687_0

...and 70 more lines here. 

有没有一种方法只能导出顶级依赖项?我知道我可以像下面这样手动创建yml文件.但是手动执行操作有点烦人.有什么方法可以自动导出顶级依赖项?

Is there a way to only export the top level dependencies? I know I can manually create the yml file like this below. But doing things manually is a bit annoying. Any way to export the top level dependencies automatically?

name: foo_environment
channels:
  - defaults
  - conda-forge
dependencies:
  - python=3.7.3
  - jupyter=1.0.0

推荐答案

有一个标志-from-history 可以使用，它只会显示已明确安装的软件包，并且应该为您提供什么你想要的:

There is a flag --from-history you can use that will only show packages that were explicitly installed and should give you what you want:

conda env export --from-history > environment.yml

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