Warning about Python 2.6 deprecation

NEWS

@@ -5,6 +5,13 @@ Glances Version 2
 Version 2.6
 ===========
 
+Deprecations:
+
+    * Add deprecation warning for Python 2.6.
+      Python 2.6 support will be dropped in future releases.
+      Please switch to at least Python 2.7 or 3.3+ as soon as possible.
+      See http://www.snarky.ca/stop-using-python-2-6 for more information.
+
 Enhancements and new features:
 
     * Add a connector to ElasticSearch (welcome to Kibana dashboard) (issue #311)

glances/__init__.py

@@ -53,6 +53,13 @@ if sys.version_info < (2, 6) or (3, 0) <= sys.version_info < (3, 3):
     print('Glances requires at least Python 2.6 or 3.3 to run.')
     sys.exit(1)
 
+if sys.version_info[:2] == (2, 6):
+    import warnings
+    warnings.warn('Python 2.6 support will be dropped. Please switch '
+                  'to at least Python 2.7 or 3.3+ as soon as possible. '
+                  'See http://www.snarky.ca/stop-using-python-2-6 '
+                  'for more information.')
+
 # Check PSutil version
 psutil_min_version = (2, 0, 0)
 psutil_version = tuple([int(num) for num in __psutil_version.split('.')])

setup.py

@@ -40,7 +40,7 @@ def get_requires():
     requires = ['psutil>=2.0.0']
     if sys.platform.startswith('win'):
         requires += ['colorconsole']
-    if sys.version_info == (2, 6):
+    if sys.version_info[:2] == (2, 6):
         requires += ['argparse', 'logutils']
 
     return requires