Pass python_requires argument to setuptools

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 9a87d66..edc1b41 100644
--- a/setup.py
+++ b/setup.py
@@ -44,6 +44,7 @@ setup(
     keywords=['Redis', 'key-value store'],
     license='MIT',
     packages=['redis'],
+    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
     extras_require={
         'hiredis': [
             "hiredis>=0.1.3",