asyncio: Sync with upstream (compat module)

Lib/asyncio/base_events.py

@@ -28,6 +28,7 @@ import traceback
 import sys
 import warnings
 
+from . import compat
 from . import coroutines
 from . import events
 from . import futures
@@ -378,7 +379,7 @@ class BaseEventLoop(events.AbstractEventLoop):
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if not self.is_closed():
                 warnings.warn("unclosed event loop %r" % self, ResourceWarning)

Lib/asyncio/base_subprocess.py

@@ -1,8 +1,8 @@
 import collections
 import subprocess
-import sys
 import warnings
 
+from . import compat
 from . import futures
 from . import protocols
 from . import transports
@@ -116,7 +116,7 @@ class BaseSubprocessTransport(transports.SubprocessTransport):
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if not self._closed:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)

Lib/asyncio/proactor_events.py

@@ -7,10 +7,10 @@ proactor is only implemented on Windows with IOCP.
 __all__ = ['BaseProactorEventLoop']
 
 import socket
-import sys
 import warnings
 
 from . import base_events
+from . import compat
 from . import constants
 from . import futures
 from . import sslproto
@@ -79,7 +79,7 @@ class _ProactorBasePipeTransport(transports._FlowControlMixin,
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if self._sock is not None:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)

Lib/asyncio/selector_events.py

@@ -10,7 +10,6 @@ import collections
 import errno
 import functools
 import socket
-import sys
 import warnings
 try:
     import ssl
@@ -18,6 +17,7 @@ except ImportError:  # pragma: no cover
     ssl = None
 
 from . import base_events
+from . import compat
 from . import constants
 from . import events
 from . import futures
@@ -568,7 +568,7 @@ class _SelectorTransport(transports._FlowControlMixin,
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if self._sock is not None:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)

Lib/asyncio/sslproto.py

@@ -1,11 +1,11 @@
 import collections
-import sys
 import warnings
 try:
     import ssl
 except ImportError:  # pragma: no cover
     ssl = None
 
+from . import compat
 from . import protocols
 from . import transports
 from .log import logger
@@ -317,7 +317,7 @@ class _SSLProtocolTransport(transports._FlowControlMixin,
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if not self._closed:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)

Lib/asyncio/unix_events.py

@@ -13,6 +13,7 @@ import warnings
 
 from . import base_events
 from . import base_subprocess
+from . import compat
 from . import constants
 from . import coroutines
 from . import events
@@ -370,7 +371,7 @@ class _UnixReadPipeTransport(transports.ReadTransport):
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if self._pipe is not None:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)
@@ -555,7 +556,7 @@ class _UnixWritePipeTransport(transports._FlowControlMixin,
     # On Python 3.3 and older, objects with a destructor part of a reference
     # cycle are never destroyed. It's not more the case on Python 3.4 thanks
     # to the PEP 442.
-    if sys.version_info >= (3, 4):
+    if compat.PY34:
         def __del__(self):
             if self._pipe is not None:
                 warnings.warn("unclosed transport %r" % self, ResourceWarning)

Lib/test/test_asyncio/test_subprocess.py

@@ -417,11 +417,7 @@ class SubprocessMixin:
     def test_popen_error(self):
         # Issue #24763: check that the subprocess transport is closed
         # when BaseSubprocessTransport fails
-        if sys.platform == 'win32':
-            target = 'asyncio.windows_utils.Popen'
-        else:
-            target = 'subprocess.Popen'
-        with mock.patch(target) as popen:
+        with mock.patch('subprocess.Popen') as popen:
             exc = ZeroDivisionError
             popen.side_effect = exc