Marking source code with a compatible Python version

Question

Is it possible to mark or label (not just with comments) source code with a python version to indicate which version of python it is compatible with and raise an error or warning when it is run with an older or incompatible python interpreter?

Edit:

if sys.version_info < (3, 8): 
    raise Exception("You need Python 3.8+")

This should do what I want.

you can use sys.version_info to recognize used Python and raise error. And usually it is used at the beginning of code. ie. sys.version_info.major >= 3 and sys.version_info.minor > 5 — furas
– furas, Commented Jul 15, 2020 at 1:06

furas · Accepted Answer · 2020-07-15 01:12:22Z

1

You can use sys.version_info to recognize what version is used to run code and raise error.

Usually it is used at script beginning.

import sys

if sys.version_info.major < 3 or sys.version_info.minor < 8:
    raise Exception("You need Python 3.8+")

It can be used also to import different modules in different versions.

answered Jul 15, 2020 at 1:12

furas

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1 Comment

RedSandman Over a year ago

I can see how your answer will work but will it break in the future with Python 4.0. I think I have found a similar check but will not break in 4.X versions of Python. if sys.version_info < (3, 8): raise Exception("You need Python 3.8+")

RedSandman · Accepted Answer · 2020-07-19 08:05:32Z

0

if sys.version_info < (3, 8): 
    raise Exception("You need Python 3.8+")

This should do the job!

answered Jul 19, 2020 at 8:05

RedSandman

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