*: Remove Python2 __future__ imports throughout the codebase

demos/file_upload/file_uploader.py

@@ -9,7 +9,6 @@
 See also file_receiver.py in this directory, a server that receives uploads.
 """
 
-from __future__ import print_function
 import mimetypes
 import os
 import sys

demos/tcpecho/client.py

@@ -1,6 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
 from tornado.ioloop import IOLoop
 from tornado import gen
 from tornado.tcpclient import TCPClient

maint/circlerefs/circlerefs.py

@@ -7,7 +7,6 @@
 increases memory footprint and CPU overhead, so we try to eliminate
 circular references created by normal operation.
 """
-from __future__ import print_function
 
 import gc
 import traceback

maint/scripts/test_resolvers.py

@@ -1,6 +1,4 @@
 #!/usr/bin/env python
-from __future__ import print_function
-
 import pprint
 import socket
 

maint/vm/windows/bootstrap.py

@@ -21,7 +21,6 @@
 To run under cygwin (which must be installed separately), run
   cd /cygdrive/e; python -m tornado.test.runtests
 """
-from __future__ import absolute_import, division, print_function
 
 import os
 import subprocess

tornado/__init__.py

@@ -15,8 +15,6 @@
 
 """The Tornado web server and tools."""
 
-from __future__ import absolute_import, division, print_function
-
 # version is a human-readable version number.
 
 # version_info is a four-tuple for programmatic comparison. The first

tornado/_locale_data.py

@@ -16,8 +16,6 @@
 
 """Data used by the tornado.locale module."""
 
-from __future__ import absolute_import, division, print_function
-
 LOCALE_NAMES = {
     "af_ZA": {"name_en": u"Afrikaans", "name": u"Afrikaans"},
     "am_ET": {"name_en": u"Amharic", "name": u"አማርኛ"},

tornado/auth.py

@@ -56,8 +56,6 @@ async def get(self):
 
 """
 
-from __future__ import absolute_import, division, print_function
-
 import base64
 import binascii
 import hashlib

tornado/autoreload.py

@@ -43,8 +43,6 @@
 
 """
 
-from __future__ import absolute_import, division, print_function
-
 import os
 import sys
 

tornado/concurrent.py

@@ -26,7 +26,6 @@
 implementation, applications rarely need to interact with it
 directly.
 """
-from __future__ import absolute_import, division, print_function
 
 import asyncio
 from concurrent import futures

tornado/curl_httpclient.py

@@ -15,8 +15,6 @@
 
 """Non-blocking HTTP client implementation using pycurl."""
 
-from __future__ import absolute_import, division, print_function
-
 import collections
 import functools
 import logging

tornado/escape.py

@@ -19,8 +19,6 @@
 have crept in over time.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import html.entities
 import json
 import re

tornado/gen.py

@@ -70,8 +70,6 @@ def get(self):
    via ``singledispatch``.
 
 """
-from __future__ import absolute_import, division, print_function
-
 import asyncio
 import builtins
 import collections

tornado/http1connection.py

@@ -18,8 +18,6 @@
 .. versionadded:: 4.0
 """
 
-from __future__ import absolute_import, division, print_function
-
 import re
 
 from tornado.concurrent import (Future, future_add_done_callback,

tornado/httpclient.py

@@ -38,8 +38,6 @@
     AsyncHTTPClient.configure("tornado.curl_httpclient.CurlAsyncHTTPClient")
 """
 
-from __future__ import absolute_import, division, print_function
-
 import functools
 import time
 import weakref

tornado/httpserver.py

@@ -25,8 +25,6 @@ class except to start a server at the beginning of the process
    to `tornado.httputil.HTTPServerRequest`.  The old name remains as an alias.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import socket
 
 from tornado.escape import native_str

tornado/httputil.py

@@ -19,8 +19,6 @@
 via `tornado.web.RequestHandler.request`.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import calendar
 import collections
 import copy

tornado/ioloop.py

@@ -30,8 +30,6 @@
 
 """
 
-from __future__ import absolute_import, division, print_function
-
 import asyncio
 from concurrent.futures import ThreadPoolExecutor
 import datetime

tornado/iostream.py

@@ -23,8 +23,6 @@
 * `PipeIOStream`: Pipe-based IOStream implementation.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import collections
 import errno
 import io

tornado/locale.py

@@ -39,8 +39,6 @@
 the `Locale.translate` method will simply return the original string.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import codecs
 import csv
 import datetime

tornado/locks.py

@@ -12,8 +12,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from __future__ import absolute_import, division, print_function
-
 import collections
 from concurrent.futures import CancelledError
 

tornado/log.py

@@ -27,8 +27,6 @@
 `logging` module.  For example, you may wish to send ``tornado.access`` logs
 to a separate file for analysis.
 """
-from __future__ import absolute_import, division, print_function
-
 import logging
 import logging.handlers
 import sys

tornado/netutil.py

@@ -15,8 +15,6 @@
 
 """Miscellaneous network utility code."""
 
-from __future__ import absolute_import, division, print_function
-
 import errno
 import os
 import sys

tornado/options.py

@@ -93,8 +93,6 @@ def start_server():
    underscores.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import datetime
 import numbers
 import re

tornado/platform/asyncio.py

@@ -19,7 +19,6 @@
    Windows. Use the `~asyncio.SelectorEventLoop` instead.
 """
 
-from __future__ import absolute_import, division, print_function
 import functools
 
 from tornado.gen import convert_yielded

tornado/platform/auto.py

@@ -22,8 +22,6 @@
     from tornado.platform.auto import set_close_exec
 """
 
-from __future__ import absolute_import, division, print_function
-
 import os
 
 if os.name == 'nt':

tornado/platform/caresresolver.py

@@ -1,4 +1,3 @@
-from __future__ import absolute_import, division, print_function
 import pycares  # type: ignore
 import socket
 

tornado/platform/interface.py

@@ -20,8 +20,6 @@
 implementation from `tornado.platform.auto`.
 """
 
-from __future__ import absolute_import, division, print_function
-
 
 def set_close_exec(fd):
     """Sets the close-on-exec bit (``FD_CLOEXEC``)for a file descriptor."""

tornado/platform/posix.py

@@ -15,8 +15,6 @@
 
 """Posix implementations of platform-specific functionality."""
 
-from __future__ import absolute_import, division, print_function
-
 import fcntl
 import os
 

tornado/platform/twisted.py

@@ -21,8 +21,6 @@
 This module has been tested with Twisted versions 11.0.0 and newer.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import socket
 import sys
 

tornado/platform/windows.py

@@ -1,8 +1,6 @@
 # NOTE: win32 support is currently experimental, and not recommended
 # for production use.
 
-
-from __future__ import absolute_import, division, print_function
 import ctypes  # type: ignore
 import ctypes.wintypes  # type: ignore
 

tornado/process.py

@@ -17,8 +17,6 @@
 the server into multiple processes and managing subprocesses.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import errno
 import os
 import multiprocessing

tornado/queues.py

@@ -25,8 +25,6 @@
 
 """
 
-from __future__ import absolute_import, division, print_function
-
 import collections
 import heapq
 

tornado/routing.py

@@ -175,8 +175,6 @@ def request_callable(request):
 
 """
 
-from __future__ import absolute_import, division, print_function
-
 import re
 from functools import partial
 

tornado/simple_httpclient.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 from tornado.escape import _unicode
 from tornado import gen
 from tornado.httpclient import HTTPResponse, HTTPError, AsyncHTTPClient, main, _RequestProxy

tornado/tcpclient.py

@@ -15,7 +15,6 @@
 
 """A non-blocking TCP connection factory.
 """
-from __future__ import absolute_import, division, print_function
 
 import functools
 import socket

tornado/tcpserver.py

@@ -14,7 +14,6 @@
 # under the License.
 
 """A non-blocking, single-threaded TCP server."""
-from __future__ import absolute_import, division, print_function
 
 import errno
 import os

tornado/template.py

@@ -195,8 +195,6 @@ class (and specifically its ``render`` method) and will not work
     `filter_whitespace` for available options. New in Tornado 4.3.
 """
 
-from __future__ import absolute_import, division, print_function
-
 import datetime
 from io import StringIO
 import linecache

tornado/test/__main__.py

@@ -2,8 +2,6 @@
 
 This only works in python 2.7+.
 """
-from __future__ import absolute_import, division, print_function
-
 from tornado.test.runtests import all, main
 
 # tornado.testing.main autodiscovery relies on 'all' being present in

tornado/test/asyncio_test.py

@@ -10,8 +10,6 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from __future__ import absolute_import, division, print_function
-
 import asyncio
 import unittest
 

tornado/test/auth_test.py

@@ -3,9 +3,6 @@
 # and ensure that it doesn't blow up (e.g. with unicode/bytes issues in
 # python 3)
 
-
-from __future__ import absolute_import, division, print_function
-
 from tornado.auth import (
     OpenIdMixin, OAuthMixin, OAuth2Mixin,
     GoogleOAuth2Mixin, FacebookGraphMixin, TwitterMixin,

tornado/test/autoreload_test.py

@@ -1,4 +1,3 @@
-from __future__ import absolute_import, division, print_function
 import os
 import shutil
 import subprocess

tornado/test/concurrent_test.py

@@ -12,8 +12,6 @@
 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 # License for the specific language governing permissions and limitations
 # under the License.
-from __future__ import absolute_import, division, print_function
-
 from concurrent import futures
 import logging
 import re

tornado/test/curl_httpclient_test.py

@@ -1,6 +1,4 @@
 # coding: utf-8
-from __future__ import absolute_import, division, print_function
-
 from hashlib import md5
 import unittest
 

tornado/test/escape_test.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import unittest
 
 import tornado.escape

tornado/test/gen_test.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import asyncio
 from concurrent import futures
 import gc

tornado/test/gettext_translations/extract_me.py

@@ -8,7 +8,6 @@
 # 3) msgfmt tornado_test.po -o tornado_test.mo
 # 4) Put the file in the proper location: $LANG/LC_MESSAGES
 
-from __future__ import absolute_import, division, print_function
 _("school")
 pgettext("law", "right")
 pgettext("good", "right")

tornado/test/http1connection_test.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import socket
 
 from tornado.http1connection import HTTP1Connection