asyncio: sync with Tulip

* Fix pyflakes warnings: remove unused imports and variables
* asyncio.test_support now uses test.support and test.script_helper if available

8 files changed, 16 insertions, 22 deletions

diff --git a/Lib/test/test_asyncio/test_base_events.py b/Lib/test/test_asyncio/test_base_events.py
index 4e5b6ca..e840915 100644
--- a/Lib/test/test_asyncio/test_base_events.py
+++ b/Lib/test/test_asyncio/test_base_events.py
@@ -14,8 +14,8 @@ from asyncio import base_events
 from asyncio import constants
 from asyncio import test_utils
 try:
-    from test.script_helper import assert_python_ok
     from test import support
+    from test.script_helper import assert_python_ok
 except ImportError:
     from asyncio import test_support as support
     from asyncio.test_support import assert_python_ok
diff --git a/Lib/test/test_asyncio/test_events.py b/Lib/test/test_asyncio/test_events.py
index 0630292..af2da1f 100644
--- a/Lib/test/test_asyncio/test_events.py
+++ b/Lib/test/test_asyncio/test_events.py
@@ -27,7 +27,7 @@ from asyncio import proactor_events
 from asyncio import selector_events
 from asyncio import test_utils
 try:
-    from test import support  # find_unused_port, IPV6_ENABLED, TEST_HOME_DIR
+    from test import support
 except ImportError:
     from asyncio import test_support as support
 
diff --git a/Lib/test/test_asyncio/test_futures.py b/Lib/test/test_asyncio/test_futures.py
index f9c3ad2..2863709 100644
--- a/Lib/test/test_asyncio/test_futures.py
+++ b/Lib/test/test_asyncio/test_futures.py
@@ -10,7 +10,7 @@ from unittest import mock
 import asyncio
 from asyncio import test_utils
 try:
-    from test import support   # gc_collect
+    from test import support
 except ImportError:
     from asyncio import test_support as support
 
diff --git a/Lib/test/test_asyncio/test_selector_events.py b/Lib/test/test_asyncio/test_selector_events.py
index 8eba56c..ff114f8 100644
--- a/Lib/test/test_asyncio/test_selector_events.py
+++ b/Lib/test/test_asyncio/test_selector_events.py
@@ -1,10 +1,7 @@
 """Tests for selector_events.py"""
 
 import errno
-import gc
-import pprint
 import socket
-import sys
 import unittest
 from unittest import mock
 try:
diff --git a/Lib/test/test_asyncio/test_subprocess.py b/Lib/test/test_asyncio/test_subprocess.py
index 08c8ac2..55c47b5 100644
--- a/Lib/test/test_asyncio/test_subprocess.py
+++ b/Lib/test/test_asyncio/test_subprocess.py
@@ -6,12 +6,12 @@ from unittest import mock
 import asyncio
 from asyncio import subprocess
 from asyncio import test_utils
-if sys.platform != 'win32':
-    from asyncio import unix_events
 try:
-    from test import support   # PIPE_MAX_SIZE
+    from test import support
 except ImportError:
     from asyncio import test_support as support
+if sys.platform != 'win32':
+    from asyncio import unix_events
 
 # Program blocking
 PROGRAM_BLOCKED = [sys.executable, '-c', 'import time; time.sleep(3600)']
diff --git a/Lib/test/test_asyncio/test_tasks.py b/Lib/test/test_asyncio/test_tasks.py
index 25b21dc..1520fb4 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -7,17 +7,17 @@ import types
 import unittest
 import weakref
 from unittest import mock
+
+import asyncio
+from asyncio import coroutines
+from asyncio import test_utils
 try:
-    from test import support   # gc_collect
+    from test import support
     from test.script_helper import assert_python_ok
 except ImportError:
     from asyncio import test_support as support
     from asyncio.test_support import assert_python_ok
 
-import asyncio
-from asyncio import coroutines
-from asyncio import test_utils
-
 
 PY34 = (sys.version_info >= (3, 4))
 PY35 = (sys.version_info >= (3, 5))
diff --git a/Lib/test/test_asyncio/test_unix_events.py b/Lib/test/test_asyncio/test_unix_events.py
index b6ad018..4b825dc 100644
--- a/Lib/test/test_asyncio/test_unix_events.py
+++ b/Lib/test/test_asyncio/test_unix_events.py
@@ -1,11 +1,9 @@
 """Tests for unix_events.py."""
 
 import collections
-import gc
 import errno
 import io
 import os
-import pprint
 import signal
 import socket
 import stat
diff --git a/Lib/test/test_asyncio/test_windows_utils.py b/Lib/test/test_asyncio/test_windows_utils.py
index b957949..af5c453 100644
--- a/Lib/test/test_asyncio/test_windows_utils.py
+++ b/Lib/test/test_asyncio/test_windows_utils.py
@@ -5,18 +5,17 @@ import sys
 import unittest
 from unittest import mock
 
-try:
-    from test import support  # gc_collect, IPV6_ENABLED
-except ImportError:
-    from asyncio import test_support as support
-
 if sys.platform != 'win32':
     raise unittest.SkipTest('Windows only')
 
 import _winapi
 
-from asyncio import windows_utils
 from asyncio import _overlapped
+from asyncio import windows_utils
+try:
+    from test import support
+except ImportError:
+    from asyncio import test_support as support
 
 
 class WinsocketpairTests(unittest.TestCase):