Announce deprecation of Python 2.7 (#603)

Author: crwilcox

README.md

@@ -23,8 +23,11 @@ $ easy_install --upgrade google-api-python-client
 
 See the [Developers Guide](https://developers.google.com/api-client-library/python/start/get_started) for more detailed instructions and additional documentation.
 
-# Python Version
-Python 2.7, 3.4, 3.5, and 3.6 are fully supported and tested. This library may work on later versions of 3, but we do not currently run tests against those versions.
+# Supported Python Versions
+Python 3.4, 3.5, 3.6 and 3.7 are fully supported and tested. This library may work on later versions of 3, but we do not currently run tests against those versions
+
+# Deprecated Python Versions
+Python == 2.7
 
 # Third Party Libraries and Dependencies
 The following libraries will be installed when you install the client library:

setup.py

@@ -25,8 +25,8 @@
   print('google-api-python-client requires python version >= 2.7.',
         file=sys.stderr)
   sys.exit(1)
-if (3, 1) <= sys.version_info < (3, 3):
-  print('google-api-python-client requires python3 version >= 3.3.',
+if (3, 1) <= sys.version_info < (3, 4):
+  print('google-api-python-client requires python3 version >= 3.4.',
         file=sys.stderr)
   sys.exit(1)
 
@@ -60,6 +60,7 @@
     author="Google Inc.",
     url="http://github.com/google/google-api-python-client/",
     install_requires=install_requires,
+    python_requires='>=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*',
     packages=packages,
     package_data={},
     license="Apache 2.0",
@@ -68,7 +69,6 @@
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',