iPython与不同的env（使用anaconda） [英] iPython with different env (using anaconda)

问题描述

我刚刚使用anaconda（称为python35）创建了一个带有python 3.5的新环境。我的根env指向python 2.7.11。我似乎无法使用这个新的env启动ipython，这就是我做的事情

I have just created a new env with python 3.5 using anaconda (called it python35). My root env points to python 2.7.11. I cant seem to launch ipython with this new env, here is what I did

1. in conda prompt, activate required env: activate python35
2. confirm the version: python --version
3. launch ipython: ipython notebook
4. open a notebook and do: import sys; print (sys.version)

步骤＃2，返回3.5，但步骤＃4总是给我2.7。 11，它像ipython一样从root env中获取python版本。我该如何解决。感谢您的帮助！

Step #2, returns 3.5 but step #4 always gives me 2.7.11, its like ipython is picking up python version from root env. How do I fix this. Thanks for any help!

这个问题是相关的，但我已经完成了它的建议。

This question is related but I have already done what it suggests.

推荐答案

AFAIK，anaconda（以及venv中）的不同环境由预先 env路径激活到 $ PATH 环境变量。这意味着，如果在env路径中找不到某个文件（例如 ipython ）（ $ PATH ），系统在 $ PATH 的后续条目中搜索它，并在根环境中找到它（保留在 $ PATH ）。要修复此行为，您需要将自己的 ipython 副本安装到anaconda env：

AFAIK, different environments in anaconda (and in venv as well) are activated by prepending env path to $PATH environment variable. It means, that if some file (eg, ipython) is not found in env path (the first entry of $PATH), the system searches for it in consequent entries of $PATH and finds it in root environment (that stays in $PATH). To fix the behavior, you need to install its own copy of ipython to anaconda env:

1. 在命令提示符下，激活环境： source activate python35 （或简单地激活python35 ，具体取决于操作系统）


2. 在环境中，发出命令 conda install ipython-notebook

1. In command prompt, activate the environment: source activate python35 (or simply activate python35, depending on the OS)
2. While in environment, issue the command conda install ipython-notebook

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