setup.py: restrict the allowable version of the python interpreter

Question

I have a Python library. Unfortunately I have not updated it to work with Python 3 yet.

In its setup.py, I added

install_requires=[\'pytho         


        

Answer 1

As of version 9.0.1 pip will honor a new python_requires string, specifying the python version required for installation, eg:

setup(
    ...,
    python_requires=">=3.3"
)

See here for more details. See also this answer on SO.