How to install and use both python 3.8 and 3.7 on windows 10

python python-3.x python-install
user3030327 picture user3030327 · Jul 5, 2020 · Viewed 7.6k times · Source

How to use Python 3.8 and 3.7 on Windows 10. I want to make two applications, but one requires 3.8 and another one 3.7. So how to manage both versions in one Windows 10.

Answer

wovano picture wovano · Jul 5, 2020

You should just install Python 3.7 and Python 3.8 and make sure that the Python Launcher for Windows is also installed (this is the default).

Then you could run your scripts using py -3.7 main.py or py -3.8 main.py to run main.py using Python versions 3.7 or 3.8, respectively.

Alternatively (even better actually), you could write the required Python version in the first line of your Python script:

#!/usr/bin/env python3.7

Note that this must be the first line of the script, otherwise it doesn't work. Now just running py main.py would automatically select the correct Python version to execute the script.

NB: If the script is executed in Linux it would also run with the correct Python version.

Related questions

cannot properly import the chatterbot and its corpus

I have used: | + - lib | | | + - chatterbot | | | + - chatterbot_corpus + - main.py I am getting this error: Traceback (most recent call last): File "main.py", line 1, in <module> from lib.chatterbot.chatterbot import ChatBot File "D:\Workspace\…

Read More
Convert bytes to a string

I'm using this code to get standard output from an external program: >>> from subprocess import * >>> command_stdout = Popen(['ls', '-l'], stdout=PIPE).communicate()[0] The communicate() method returns an array of bytes: >>> …

Read More
Best way to convert string to bytes in Python 3?

There appear to be two different ways to convert a string to bytes, as seen in the answers to TypeError: 'str' does not support the buffer interface Which of these methods would be better or more Pythonic? Or is it …

Read More