Pass python_requires argument to setuptools (#1208)

Helps pip decide what version of the library to install.

https://packaging.python.org/tutorials/distributing-packages/#python-requires

> If your project only runs on certain Python versions, setting the
> python_requires argument to the appropriate PEP 440 version specifier
> string will prevent pip from installing the project on other Python
> versions.

https://setuptools.readthedocs.io/en/latest/setuptools.html#new-and-changed-setup-keywords

> python_requires
>
> A string corresponding to a version specifier (as defined in PEP 440)
> for the Python version, used to specify the Requires-Python defined in
> PEP 345.

1 files changed, 1 insertions, 0 deletions

diff --git a/setup.py b/setup.py
index 1625a3eb..d8db694e 100755
--- a/setup.py
+++ b/setup.py
@@ -338,6 +338,7 @@ def main():
     )
     if setuptools is not None:
         kwargs.update(
+            python_requires=">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
             test_suite="psutil.tests.get_suite",
             tests_require=tests_require,
             extras_require=extras_require,