From c3dc912caed2f39b2330a975fd4f217acc45f44a Mon Sep 17 00:00:00 2001
From: Jon Dufresne <jon.dufresne@gmail.com>
Date: Tue, 30 Oct 2018 06:38:47 -0700
Subject: [PATCH] Pass python_requires argument to setuptools (#154)

Helps pip decide what version of the library to install.

https://packaging.python.org/guides/distributing-packages-using-setuptools/#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.
---
 setup.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/setup.py b/setup.py
index 398ba7cb..ced8d42d 100644
--- a/setup.py
+++ b/setup.py
@@ -200,6 +200,7 @@ def run_tests(self):
     author=__about__["__author__"],
     author_email=__about__["__email__"],
 
+    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*",
     install_requires=[
         CFFI_DEPENDENCY,
         SIX_DEPENDENCY,