ensure package fails to install on Python 2

Author: Adam Johnson

README.md

@@ -1,7 +1,7 @@
 # notebook_xterm
 [![PyPI version](https://badge.fury.io/py/notebook-xterm.svg)](https://badge.fury.io/py/notebook-xterm)
 
-A fully-functional terminal emulator in an IPython/Jupyter notebook. This is useful for notebook environments that don't provide shell access. Uses [xterm.js](https://xtermjs.org) for a VT100-compliant Javascript terminal front-end component. Instead of an actual WebSocket, notebook_xterm uses the Javascript Jupyter cell execute function `Jupyter.notebook.kernel.execute()` as a channel to communicate between the Python runtime on the server (`TerminalServer`) and JavaScript runtime in the browser (`TerminalClient`).
+A fully-functional terminal emulator in an IPython/Jupyter notebook. This is useful for notebook environments that don't provide shell access. Uses [xterm.js](https://xtermjs.org) for a VT100-compliant Javascript terminal front-end component. Instead of an actual WebSocket, notebook_xterm uses the Javascript Jupyter cell execute function `Jupyter.notebook.kernel.execute()` as a channel to communicate between the Python runtime on the server (`TerminalServer`) and JavaScript runtime in the browser (`TerminalClient`). Note that currently this extension works only in Python 3 notebooks--Python 2 is not supported.
 
 ![notebook_xterm_animation](https://user-images.githubusercontent.com/1238730/33512219-7d093170-d6f9-11e7-905f-480d62d17cd2.gif)
 

notebook_xterm/__init__.py

@@ -1,5 +1,5 @@
 """A fully-functional terminal emulator in a Jupyter notebook."""
-__version__ = '0.1.1'
+__version__ = '0.1.2'
 from .xterm import Xterm
 
 def load_ipython_extension(ipython):

pypi_dist.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+#be sure to update the version in setup.py and notebook_xterm/__init__.py
+rm -rf dist/*
+python setup.py sdist
+python setup.py bdist_wheel
+twine upload dist/*

setup.py

@@ -1,13 +1,14 @@
 from setuptools import setup
 
 setup(name='notebook_xterm',
-      version='0.1.1',
+      version='0.1.2',
       description='A fully-functional terminal emulator in a Jupyter notebook.',
       url='http://github.com/adamj9431/notebook_xterm',
       author='Adam Johnson',
       author_email='adam.johnson@us.ibm.com',
       license='MIT',
       packages=['notebook_xterm'],
       keywords='Jupyter xterm notebook terminal bash shell cli',
+      python_requires='~=3.3',
       include_package_data=True,
       zip_safe=False)