More changes to indicate Python 3 requirement

IPython/__init__.py

@@ -30,8 +30,8 b' import warnings'
 
 # Don't forget to also update setup.py when this changes!
 v = sys.version_info
-if v[:2] < (2,7) or (v[0] >= 3 and v[:2] < (3,3)):
-    raise ImportError('IPython requires Python version 2.7 or 3.3 or above.')
+if v[:2] < (3,3):
+    raise ImportError('IPython requires Python version 3.3 or above.')
 del v
 
 # Make it easy to import extensions - they are always directly on pythonpath.

README.rst

@@ -22,8 +22,8 b' Welcome to IPython. Our full documentation is available on `ipython.readthedocs'
 <https://ipython.readthedocs.io/en/stable/>`_ and contain information on how to install, use
 contribute to the project.
 
-Officially, IPython requires Python version 2.7, or 3.3 and above.
-IPython 1.x is the last IPython version to support Python 2.6 and 3.2.
+Officially, IPython requires Python version 3.3 and above.
+IPython 5.x is the last IPython version to support Python 2.7.
 
 The Notebook, Qt console and a number of other pieces are now parts of *Jupyter*.
 See the `Jupyter installation docs <http://jupyter.readthedocs.io/en/latest/install.html>`__

docs/source/install/install.rst

@@ -4,7 +4,7 b' Installing IPython'
 ==================
 
 
-IPython requires Python 2.7 or ≥ 3.3.
+IPython 6 requires Python ≥ 3.3. IPython 5.x can be installed on Python 2.
 
 
 Quick Install 

setup.py

@@ -27,8 +27,8 b' import sys'
 # This check is also made in IPython/__init__, don't forget to update both when
 # changing Python version requirements.
 v = sys.version_info
-if v[:2] < (2,7) or (v[0] >= 3 and v[:2] < (3,3)):
-    error = "ERROR: IPython requires Python version 2.7 or 3.3 or above."
+if v[:2] < (3,3):
+    error = "ERROR: IPython requires Python version 3.3 or above."
     print(error, file=sys.stderr)
     sys.exit(1)
 
@@ -239,6 +239,7 b' for key, deps in extras_require.items():'
 extras_require['all'] = everything
 
 if 'setuptools' in sys.modules:
+    setuptools_extra_args['python_requires'] = '>=3.3'
     setuptools_extra_args['zip_safe'] = False
     setuptools_extra_args['entry_points'] = {
         'console_scripts': find_entry_points(),

tools/toollib.py

@@ -21,8 +21,7 b" archive = '%s:%s' % (archive_user, archive_dir)"
 sdists = './setup.py sdist --formats=gztar,zip'
 # Binary dists
 def buildwheels():
-    for py in ('2', '3'):
-        sh('python%s setupegg.py bdist_wheel' % py)
+    sh('python3 setupegg.py bdist_wheel' % py)
 
 # Utility functions
 def sh(cmd):