Running python 3 from command line when I have python 2 & 3 both installed

Question

I started writing code in python 2, but am now doing a course that runs with python 3, so I have both installed on my Windows computer. Python 2 is my default. Is there a way to launch python 3 from the command line if python 2 is my default? Thanks!

simply write python3 my_code.py, this will use python3 if properly installed — Deusdeorum
– Deusdeorum, Commented Mar 9, 2016 at 8:52

Avión · Accepted Answer · 2016-03-09 09:11:40Z

2

if you are using windows, add the Python3 folder to the PATH variable. And then rename the python.exe to python3.exe and then you can easily use it from command line.

Also you might observe that you will be having two IDLE editors, so you can select the one which uses version you want then run code as you usually do.

If you have linux then you already have python and python3 in the system,

edited Mar 9, 2016 at 9:11

Avión

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answered Mar 9, 2016 at 8:59

GIRISH RAMNANI

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The User · Accepted Answer · 2016-03-09 08:57:46Z

1

This may be helpful for others encountering the same problem.

You can type: py -3

to launch python 3 if you have python 2 installed as your default.

answered Mar 9, 2016 at 8:57

The User

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Vsevolod Gromov · Accepted Answer · 2016-03-09 09:03:15Z

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Try: cd C:\Python34\ python.exe [path_to_you_script]

example: cd C:\Python34\ python.exe "C:\Python34\000\my_script.py"

answered Mar 9, 2016 at 9:03

Vsevolod Gromov

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