API

Defining requirements

import scriptenv
scriptenv.requires('rsa==4.8')

import rsa
assert rsa.__version__ == "4.8"

use requires as context manager

import scriptenv

with scriptenv.requires("rsa==4.8"):
    import rsa
    assert rsa.__version__ == "4.8" 

with scriptenv.requires("rsa==4.7"):
    import rsa
    assert rsa.__version__ == "4.7"