Drop support for Python 3.3

.travis.yml

@@ -5,7 +5,6 b' python:'
     - 3.6
     - 3.5
     - 3.4
-    - 3.3
 sudo: false
 env:
   global:

IPython/__init__.py

@@ -27,12 +27,12 b' import sys'
 #-----------------------------------------------------------------------------
 
 # Don't forget to also update setup.py when this changes!
-if sys.version_info < (3,3):
+if sys.version_info < (3,4):
     raise ImportError(
 """
-IPython 6.0+ does not support Python 2.6, 2.7, 3.0, 3.1, or 3.2.
+IPython 6.3+ supports Python 3.4 and above.
 When using Python 2.7, please install IPython 5.x LTS Long Term Support version.
-Beginning with IPython 6.0, Python 3.3 and above is required.
+Python 3.3 was supported up to IPython 6.2.
 
 See IPython `README.rst` file for more information:
 

setup.py

@@ -26,7 +26,7 b' import sys'
 #
 # This check is also made in IPython/__init__, don't forget to update both when
 # changing Python version requirements.
-if sys.version_info < (3, 3):
+if sys.version_info < (3, 4):
     pip_message = 'This may be due to an out of date pip. Make sure you have pip >= 9.0.1.'
     try:
         import pip
@@ -175,7 +175,7 b' extras_require = dict('
     parallel = ['ipyparallel'],
     qtconsole = ['qtconsole'],
     doc = ['Sphinx>=1.3'],
-    test = ['nose>=0.10.1', 'requests', 'testpath', 'pygments', 'nbformat', 'ipykernel'],
+    test = ['nose>=0.10.1', 'requests', 'testpath', 'pygments', 'nbformat', 'ipykernel', 'numpy'],
     terminal = [],
     kernel = ['ipykernel'],
     nbformat = ['nbformat'],
@@ -200,8 +200,6 b' install_requires = ['
 # but requires pip >= 6. pip < 6 ignores these.
 
 extras_require.update({
-    'test:python_version >= "3.4"': ['numpy'],
-    ':python_version == "3.3"': ['pathlib2'],
     ':python_version <= "3.4"': ['typing'],
     ':sys_platform != "win32"': ['pexpect'],
     ':sys_platform == "darwin"': ['appnope'],
@@ -232,7 +230,7 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['python_requires'] = '>=3.4'
     setuptools_extra_args['zip_safe'] = False
     setuptools_extra_args['entry_points'] = {
         'console_scripts': find_entry_points(),