CODEWITHSUNDEEP
pythonwindowspython-2.7python-3.x
HUSMEN
HUSMEN

Reputation: 366

Running both Python 2.7 and 3.5 on PC

I have both versions of Python installed on my PC running Windows 10 and I can switch between them manually as needed, but I was wondering if there is a way to edit their path environment variables so that I can launch both of them from the CMD easily.

For example, instead of typing "python" to launch whatever is the default one right now, I want to just type python2 for one, and python3 for the other, is that possible?

Update: it turned out that you don't need any trick for this, you just use either py -2 or py -3 accordingly. Alternatively, you can configure your own aliases in cmd as mentioned below.

Upvotes: 6

Views: 3900

Answers (3)

J.J. Hakala
J.J. Hakala

Reputation: 6214

I have copied two batch files from WinPython distribution,

cmd.bat

@echo off
call %~dp0env.bat
cmd.exe /k

and env.bat (edited)

@echo off
set WINPYDIR=C:\devel\Python34
set PATH=%WINPYDIR%\;%WINPYDIR%\DLLs;%WINPYDIR%\Scripts;%PATH%;

where WINPYDIR corresponds to the install path. I have placed these to Scripts subdirectory (for example C:\devel\Python34\Scripts), and then a suitable shortcut on desktop that launches command prompt with PATH variable set.

Upvotes: 0

forevergenin
forevergenin

Reputation: 1200

You can try virtualenv or cygwin. Using the later you can have both versions python installed and invoked as you from the same terminal.

Another possible alternative might be Ubuntu on Windows but personally I have not tried this.

If your are looking for a native solution to use in Windows Command Prompt or Power Shell, as mentioned by Paradoxinabox you have to go with aliases.

Upvotes: 0

Paradoxinabox
Paradoxinabox

Reputation: 81

This has more to do with Windows and less to do with Python IMO. You might want to take a look at Aliases in windows command prompt You should be able to use 

DOSKEY python3=C:\path\to\python3.exe $*
DOSKEY python2=C:\path\to\python2.exe $*

to define the alias. You can then put those in a .cmd file e.g. env.cmd and use

cmd.exe /K env.cmd

to automatically load the aliases into the shell when you run it. That's the way I would go about doing this. I hope it helps.

Upvotes: 2

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