Drop support for Python 3.2.

Remove python 3.2 support from all test configurations and docs,
but do not actively remove code that exists for 3.2 compatibility.

.travis.yml

@@ -4,7 +4,6 @@ python:
     - 2.7.8
     - 2.7
     - pypy
-    - 3.2
     - 3.3
     - 3.4
     - 3.5
@@ -21,17 +20,13 @@ install:
     # TODO(bdarnell): pycares tests are currently disabled on travis due to ipv6 issues.
     #- if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* && $DEPS == true ]]; then travis_retry pip install pycares; fi
     - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* && $DEPS == true ]]; then travis_retry pip install pycurl; fi
-    - if [[ $TRAVIS_PYTHON_VERSION == '3.2' && $DEPS == true ]]; then travis_retry pip install mock; fi
     # Twisted runs on 2.x and 3.3+, but is flaky on pypy.
-    - if [[ $TRAVIS_PYTHON_VERSION != '3.2' && $TRAVIS_PYTHON_VERSION != 'pypy'* && $DEPS == true ]]; then travis_retry pip install Twisted; fi
+    - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* && $DEPS == true ]]; then travis_retry pip install Twisted; fi
     - if [[ $TRAVIS_PYTHON_VERSION == '2.7' && $DEPS == true ]]; then travis_retry pip install sphinx sphinx_rtd_theme; fi
     - if [[ $TRAVIS_PYTHON_VERSION == '3.5' && $DEPS == true ]]; then travis_retry pip install sphinx sphinx_rtd_theme; fi
     # On travis the extension should always be built
     - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* ]]; then export TORNADO_EXTENSION=1; fi
     - travis_retry python setup.py install
-    # Coverage 4.0 no longer supports py32. Install an older version before
-    # codecov tries to install the latest.
-    - if [[ $TRAVIS_PYTHON_VERSION == '3.2' ]]; then travis_retry pip install 'coverage<4.0'; fi
     - travis_retry pip install codecov
     - curl-config --version; pip freeze
 
@@ -61,12 +56,12 @@ script:
     - if [[ $TRAVIS_PYTHON_VERSION != pypy* && $DEPS == true ]]; then python $TARGET --resolver=tornado.netutil.ThreadedResolver; fi
     - if [[ $TRAVIS_PYTHON_VERSION == 2* && $DEPS == true ]]; then python $TARGET --httpclient=tornado.curl_httpclient.CurlAsyncHTTPClient; fi
     - if [[ $TRAVIS_PYTHON_VERSION == 2* && $DEPS == true ]]; then python $TARGET --ioloop_time_monotonic; fi
-    - if [[ $TRAVIS_PYTHON_VERSION != '3.2' && $TRAVIS_PYTHON_VERSION != 'pypy'* && $DEPS == true ]]; then python $TARGET --ioloop=tornado.platform.twisted.TwistedIOLoop; fi
+    - if [[ $TRAVIS_PYTHON_VERSION != 'pypy'* && $DEPS == true ]]; then python $TARGET --ioloop=tornado.platform.twisted.TwistedIOLoop; fi
     - if [[ $TRAVIS_PYTHON_VERSION == 3.4 || $TRAVIS_PYTHON_VERSION == 3.5 ]]; then python $TARGET --ioloop=tornado.platform.asyncio.AsyncIOLoop; fi
     - if [[ $TRAVIS_PYTHON_VERSION == 2* && $DEPS == true ]]; then python $TARGET --ioloop=tornado.platform.asyncio.AsyncIOLoop; fi
     - if [[ $TRAVIS_PYTHON_VERSION == 2* && $DEPS == true ]]; then python $TARGET --resolver=tornado.platform.twisted.TwistedResolver; fi
     #- if [[ $TRAVIS_PYTHON_VERSION != pypy* && $DEPS == true ]]; then python $TARGET --resolver=tornado.platform.caresresolver.CaresResolver; fi
-    - if [[ $TRAVIS_PYTHON_VERSION == 3* && $TRAVIS_PYTHON_VERSION != '3.2' ]]; then python $TARGET --ioloop_time_monotonic; fi
+    - if [[ $TRAVIS_PYTHON_VERSION == 3* ]]; then python $TARGET --ioloop_time_monotonic; fi
     # make coverage reports for Codecov to find
     - if [[ $TRAVIS_PYTHON_VERSION != nightly ]]; then coverage xml; fi
     - export TORNADO_EXTENSION=0

docs/guide/async.rst

@@ -131,7 +131,7 @@ the original synchronous version:
    :hide:
 
 The statement ``raise gen.Return(response.body)`` is an artifact of
-Python 2 (and 3.2), in which generators aren't allowed to return
+Python 2, in which generators aren't allowed to return
 values. To overcome this, Tornado coroutines raise a special kind of
 exception called a `.Return`. The coroutine catches this exception and
 treats it like a returned value. In Python 3.3 and later, a ``return

docs/index.rst

@@ -79,9 +79,8 @@ copy of the source tarball as well.
 The Tornado source code is `hosted on GitHub
 <https://github.com/tornadoweb/tornado>`_.
 
-**Prerequisites**: Tornado 4.3 runs on Python 2.7, and 3.2+
-(support for Python 3.2 is deprecated and will be removed in
-the next release). For Python 2, version 2.7.9 or newer is *strongly*
+**Prerequisites**: Tornado 4.3 runs on Python 2.7, and 3.3+
+For Python 2, version 2.7.9 or newer is *strongly*
 recommended for the improved SSL support. In addition to the requirements
 which will be installed automatically by ``pip`` or ``setup.py install``,
 the following optional packages may be useful:

maint/test/cython/tox.ini

@@ -1,6 +1,6 @@
 [tox]
 # This currently segfaults on pypy.
-envlist = py27,py32,py33,py34,py35
+envlist = py27,py33,py34,py35
 
 [testenv]
 deps =
@@ -13,7 +13,6 @@ commands = python -m unittest cythonapp_test
 # defaults for the others.
 basepython =
            py27: python2.7
-           py32: python3.2
            py33: python3.3
            py34: python3.4
            py35: python3.5

maint/test/websocket/fuzzingclient.json

@@ -5,7 +5,7 @@
    "servers": [
        {"agent": "Tornado/py27", "url": "ws://localhost:9001",
         "options": {"version": 18}},
-       {"agent": "Tornado/py34", "url": "ws://localhost:9002",
+       {"agent": "Tornado/py35", "url": "ws://localhost:9002",
         "options": {"version": 18}},
        {"agent": "Tornado/pypy", "url": "ws://localhost:9003",
         "options": {"version": 18}}

maint/test/websocket/run-client.sh

@@ -10,7 +10,7 @@ FUZZING_SERVER_PID=$!
 sleep 1
 
 .tox/py27/bin/python client.py --name='Tornado/py27'
-.tox/py34/bin/python client.py --name='Tornado/py32'
+.tox/py35/bin/python client.py --name='Tornado/py35'
 .tox/pypy/bin/python client.py --name='Tornado/pypy'
 
 kill $FUZZING_SERVER_PID

maint/test/websocket/run-server.sh

@@ -15,8 +15,8 @@ tox
 .tox/py27/bin/python server.py --port=9001 &
 PY27_SERVER_PID=$!
 
-.tox/py34/bin/python server.py --port=9002 &
-PY32_SERVER_PID=$!
+.tox/py35/bin/python server.py --port=9002 &
+PY35_SERVER_PID=$!
 
 .tox/pypy/bin/python server.py --port=9003 &
 PYPY_SERVER_PID=$!
@@ -26,7 +26,7 @@ sleep 1
 .tox/py27/bin/wstest -m fuzzingclient
 
 kill $PY27_SERVER_PID
-kill $PY32_SERVER_PID
+kill $PY35_SERVER_PID
 kill $PYPY_SERVER_PID
 wait
 

maint/test/websocket/tox.ini

@@ -2,7 +2,7 @@
 # to install autobahn and build the speedups module.
 # See run.sh for the real test runner.
 [tox]
-envlist = py27, py32, pypy
+envlist = py27, py35, pypy
 setupdir=../../..
 
 [testenv]

maint/vm/ubuntu10.04/setup.sh

@@ -26,8 +26,6 @@ apt-get update
 DEADSNAKES_PACKAGES="
 python2.7
 python2.7-dev
-python3.2
-python3.2-dev
 "
 apt-get -y install $DEADSNAKES_PACKAGES
 

maint/vm/ubuntu10.04/tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27-full, py32, py27
+envlist = py27-full, py27
 setupdir=/tornado
 toxworkdir=/home/vagrant/tox-tornado
 

maint/vm/ubuntu12.04/setup.sh

@@ -24,8 +24,8 @@ add-apt-repository ppa:fkrull/deadsnakes
 apt-get update
 
 DEADSNAKES_PACKAGES="
-python3.2
-python3.2-dev
+python3.5
+python3.5-dev
 "
 apt-get -y install $DEADSNAKES_PACKAGES
 

maint/vm/ubuntu12.04/tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27-full, py32, py27, py27-select, py27-twisted
+envlist = py27-full, py27, py27-select, py27-twisted
 setupdir=/tornado
 toxworkdir=/home/vagrant/tox-tornado
 
@@ -28,7 +28,3 @@ deps =
      pycurl
      twisted==12.2.0
 commands = python -m tornado.test.runtests --ioloop=tornado.platform.twisted.TwistedIOLoop {posargs:}
-
-[testenv:py32]
-basepython = python3.2
-commands = python -bb -m tornado.test.runtests {posargs:}

maint/vm/windows/bootstrap.py

@@ -29,7 +29,6 @@ TMPDIR = r'c:\tornado_bootstrap'
 
 PYTHON_VERSIONS = [
     (r'c:\python27\python.exe', 'http://www.python.org/ftp/python/2.7.3/python-2.7.3.msi'),
-    (r'c:\python32\python.exe', 'http://www.python.org/ftp/python/3.2.3/python-3.2.3.msi'),
     (r'c:\python33\python.exe', 'http://www.python.org/ftp/python/3.3.0/python-3.3.0.msi'),
     ]
 

maint/vm/windows/tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py27-full, py32-full, py27, py32, py33, py27-opt, py33-monotonic
+envlist = py27-full, py27, py33, py27-opt, py33-monotonic
 setupdir = e:\
 toxworkdir = c:\tox-tornado
 
@@ -12,11 +12,6 @@ deps =
      futures
      mock
 
-[testenv:py32-full]
-basepython = python3.2
-deps =
-     mock
-
 [testenv:py33]
 # tox's path mappings haven't been updated for py33 yet.
 basepython = c:\python33\python.exe

setup.py

@@ -172,7 +172,6 @@ setup(
         'Programming Language :: Python :: 2',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.2',
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: Implementation :: CPython',

tox.ini

@@ -15,8 +15,8 @@ envlist =
         # Basic configurations: Run the tests in both minimal installations
         # and with all optional dependencies.
         # (pypy3 doesn't have any optional deps yet)
-        {py27,pypy,py32,py33,py34,py35,pypy3},
-        {py27,pypy,py32,py33,py34,py35}-full,
+        {py27,pypy,py33,py34,py35,pypy3},
+        {py27,pypy,py33,py34,py35}-full,
 
         # Also run the tests with each possible replacement of a default
         # component.  Run each test on both python 2 and 3 where possible.
@@ -35,7 +35,7 @@ envlist =
 
         # Alternate Resolvers.
         {py2,py3}-full-{threadedresolver},
-        {py2,py32}-full-caresresolver,
+        {py2,py3}-full-caresresolver,
 
         # Other configurations; see comments below.
         {py2,py3}-{monotonic,opt},
@@ -54,7 +54,6 @@ envlist =
 # defaults for the others.
 basepython =
            py27: python2.7
-           py32: python3.2
            py33: python3.3
            py34: python3.4
            py35: python3.5
@@ -70,20 +69,20 @@ deps =
      py3-unittest2: unittest2py3k
      # cpython-only deps: pycurl installs but curl_httpclient doesn't work;
      # twisted mostly works but is a bit flaky under pypy.
-     {py27,py32,py33,py34,py35}-full: pycurl
+     {py27,py33,py34,py35}-full: pycurl
      {py2,py3}: pycurl>=7.19.3.1
-     # twisted is cpython only and doesn't support py32.
+     # twisted is cpython only.
      {py27,py33,py34,py35}-full: twisted
      {py2,py3}: twisted
      # pycares installation currently fails on py33
      # (https://github.com/pypa/pip/pull/816)
-     {py2,py27,py32,py33,py34,py35}-full: pycares
+     {py2,py3,py27,py33,py34,py35}-full: pycares
      # futures became standard in py32
      {py2,py27,pypy}-full: futures
      # mock became standard in py33
-     {py2,py27,pypy,py3,py32,pypy3}-full: mock
+     {py2,py27,pypy,py3,pypy3}-full: mock
      # singledispatch became standard in py34.
-     {py2,py27,pypy,py3,py32,py33}-full: singledispatch
+     {py2,py27,pypy,py3,py33}-full: singledispatch
      py33-asyncio: asyncio
      trollius: trollius
      py2-monotonic: Monotime
@@ -92,7 +91,7 @@ deps =
 
 setenv =
        # The extension is mandatory on cpython.
-       {py2,py27,py3,py32,py33,py34,py35}: TORNADO_EXTENSION=1
+       {py2,py27,py3,py33,py34,py35}: TORNADO_EXTENSION=1
        # In python 3, opening files in text mode uses a
        # system-dependent encoding by default.  Run the tests with "C"
        # (ascii) and "utf-8" locales to ensure we don't have hidden
@@ -101,7 +100,7 @@ setenv =
        lang_utf8: LANG=en_US.utf-8
        # tox's parser chokes if all the setenv entries are conditional.
        DUMMY=dummy
-       {py2,py27,py3,py32,py33,py34,py35}-no-ext: TORNADO_EXTENSION=0
+       {py2,py27,py3,py33,py34,py35}-no-ext: TORNADO_EXTENSION=0
 
 # All non-comment lines but the last must end in a backslash.
 # Tox filters line-by-line based on the environment name.
@@ -109,7 +108,7 @@ commands =
          python \
          # py3*: -b turns on an extra warning when calling
          # str(bytes), and -bb makes it an error.
-         {py3,py32,py33,py34,py35,pypy3}: -bb \
+         {py3,py33,py34,py35,pypy3}: -bb \
          # Python's optimized mode disables the assert statement, so
          # run the tests in this mode to ensure we haven't fallen into
          # the trap of relying on an assertion's side effects or using