我在自己安装了Python 2.7和Python 3.4的windows计算机上所做的是，我在与Python.exe文件相同的目录下编写了一个简单的。bat文件。它们看起来像，

cmd /k "c:\python27\python.exe" %*

%*允许您随后添加参数(Python文件)。我相信/k在运行完脚本后会保持提示打开。然后我将其保存为python27.bat，然后我进入Python 3目录并在那里创建一个bat文件。现在我可以在命令行中写了

Python27 helloworld.py

Or

Python34 helloworld.py

它们将在各自版本的Python中运行。确保c:\python27和c:\python34在你的环境变量中。

我从这里得到了答案

以下是你可以做的:

安装cmd。 打开并使用cmd终端，就像你会使用cmd终端一样。 使用命令alias创建命令别名。

我做了以下事情:

alias python2 = c:\python27\python.exe
alias python3 = c:\python34\python.exe

就是这样!: -)

我所做的就是下载2.7.6和3.3.4。Python 3.3.4提供了在环境变量中添加路径的选项，这样就完成了。所以基本上我只是手动添加了Python 2.7.6。

如何……

Start > in the search type in environment select "Edit environment variables to your account"1 Scroll down to Path, select path, click edit. Add C:\Python27; so you should have paths to both versions of Python there, but if you don't this you can easily edit it so that you do..... C:\Python27;C:\Python33; Navigate to the Python27 folder in C:\ and rename a copy of python.exe to python2.exe Navigate to the Python34 folder in C:\ and rename a copy of python.exe to python3.exe Test: open up commmand prompt and type python2 ....BOOM! Python 2.7.6. exit out. Test: open up commmand prompt and type python3 ....BOOM! Python 3.4.3. exit out.

注意:(为了不破坏步骤4和5中的pip命令，将python.exe的副本保存在与重命名文件相同的目录中)

我自己也遇到过这个问题，我把我的启动器放在。bat中，这样你就可以选择你想要启动的版本。

唯一的问题是你的.py必须在python文件夹中，但不管怎样，这里是代码:

对于Python2

@echo off
title Python2 Launcher by KinDa
cls
echo Type the exact version of Python you use (eg. 23, 24, 25, 26)
set/p version=
cls
echo Type the file you want to launch without .py (eg. hello world, calculator)
set/p launch=
path = %PATH%;C:\Python%version%
cd C:\Python%version%
python %launch%.py
pause

对于Python3

@echo off
title Python3 Launcher by KinDa
cls
echo Type the exact version of Python you use (eg. 31, 32, 33, 34)
set/p version=
cls
echo Type the file you want to launch without .py (eg. hello world, calculator)
set/p launch=
cls
set path = %PATH%:C:\Python%version%
cd C:\Python%version%
python %launch%.py
pause

将它们保存为。bat，并按照里面的说明进行操作。

Windows版本有Python启动器，请参阅3.4节。Windows Python启动器

I just had to install them. Then I used the free (and portable) soft at http://defaultprogramseditor.com/ under "File type settings"/"Context menu"/search:"py", chose .py file and added an 'open' command for the 2 IDLE by copying the existant command named 'open with IDLE, changing names to IDLE 3.4.1/2.7.8, and remplacing the files numbers of their respective versions in the program path. Now I have just to right click the .py file and chose which IDLE I want to use. Can do the same with direct interpreters if you prefer.