hmchzb19's blog

使用不同版本的python来启动ipython

 
  • Mar 24, 2019

我的笔记本上有多个python3的版本, 3.5, 3.6, 3.7 都有，我有时候想要在不同的python版本间切换。后来得知有两种办法，第一种方法.

  1. 使用python[VERION] -m IPython的办法来调用ipython 
     python3.6 -m IPythons
 Python 3.6.6 (default, Jun 27 2018, 14:44:17)
 Type "copyright", "credits" or "license" for more information.

 IPython 5.5.0 -- An enhanced Interactive Python.
 ? -> Introduction and overview of IPython's features.
 %quickref -> Quick reference.
 help -> Python's own help system.
 object? -> Details about 'object', use 'object??' for extra details.

 In [1]: exit

 python3.7 -m IPython
 Python 3.7.2+ (default, Feb 2 2019, 14:31:48)
 Type "copyright", "credits" or "license" for more information.

 IPython 5.5.0 -- An enhanced Interactive Python.
 ? -> Introduction and overview of IPython's features.
 %quickref -> Quick reference.
 help -> Python's own help system.
 object? -> Details about 'object', use 'object??' for extra details.
  2. ipython 其实是个shell 脚本。我有多个ipython版本，打开看看内容，就是个简单的bash脚本
    把VERSION这个变量修改下，就能Invoke不同的python版本.
    3.7就是python3.7 3.6就是python3.6
    #! /bin/sh

    VERSION="3.7"

    if [ ! -f /usr/bin/python$VERSION ]
    then
        echo "Please install the python$VERSION package." >&2
        exit 1
    else
        exec python$VERSION -c "import sys; sys.argv[0] = '/usr/bin/ipython$VERSION'; from IPython.terminal.ipapp import launch_new_instance; launch_new_instance()" "$@"
    fi
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