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如何在Anaconda中修改python版本

如何安装Anaconda及基本的使用请参考 macOS下Anaconda的安装及环境切换(Python2/Python3)

我在安装Anaconda的时候,软件自带的版本是Python3.6的,如果我现在需要使用Python2.7或者Python3.7,应该怎么操作呢?

如果我们在Anaconda Navigator控制台上做Create操作,环境是可以成功创建,但环境里面携带的包是非常少的。

所以可以参考如下方式进行Python版本修改。

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conda create -n python37 python=3.7 anaconda

如果conda的版本比较旧的话,会出现如下提示:

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==> WARNING: A newer version of conda exists. <==
current version: 4.6.2
latest version: 4.6.7

Please update conda by running

$ conda update -n base -c defaults conda

所以我们可以先执行命令

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conda update -n base -c defaults conda

然后再执行conda create命令

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conda create -n python37 python=3.7 anaconda
Collecting package metadata: done
Solving environment: done

## Package Plan ##

environment location: /Users/simon/anaconda3/envs/python37

added / updated specs:
- anaconda
- python=3.7


The following packages will be downloaded:

package | build
---------------------------|-----------------
mkl-2019.1 | 144 154.4 MB
------------------------------------------------------------
Total: 154.4 MB

The following NEW packages will be INSTALLED:

alabaster pkgs/main/osx-64::alabaster-0.7.12-py37_0
anaconda pkgs/main/osx-64::anaconda-2018.12-py37_0
...
...
Proceed ([y]/n)? y


Downloading and Extracting Packages
mkl-2019.1 | 154.4 MB | ###################################################################################################### | 100%
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
#
# To activate this environment, use:
# > source activate python37
#
# To deactivate an active environment, use:
# > source deactivate
#

按照上面的提示,我们可以执行如下命令激活或失效某个python环境。

  • 激活
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source activate python37
  • 失效
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source deactivate