Warn when installing

Author: hugovk

setup.py

@@ -1,10 +1,20 @@
 #!/usr/bin/env python
 
 import io
+import sys
+import warnings
 
 from setuptools import setup, find_packages
 
 
+if sys.version_info[:2] <= (2, 6) or ((3, 0) <= sys.version_info[:2] <= (3, 3)):
+    python_ver = '.'.join(str(x) for x in sys.version_info[:3])
+
+    warnings.warn('You are using Python {0}, which will no longer be supported in '
+                  'JMESPath 1.0'.format(python_ver),
+                  DeprecationWarning)
+
+
 setup(
     name='jmespath',
     version='0.9.5',