fix windows

Lib/asyncio/base_subprocess.py

@@ -3,6 +3,7 @@
 import warnings
 import os
 import signal
+import sys
 
 from . import protocols
 from . import transports
@@ -144,18 +145,31 @@ def _check_proc(self):
         if self._proc is None:
             raise ProcessLookupError()
 
-    def send_signal(self, signal):
-        self._check_proc()
-        try:
-            os.kill(self._proc.pid, signal)
-        except ProcessLookupError:
-            pass
+    if sys.platform == 'win32':
+        def send_signal(self, signal):
+            self._check_proc()
+            self._proc.send_signal(signal)
+
+        def terminate(self):
+            self._check_proc()
+            self._proc.terminate()
+
+        def kill(self):
+            self._check_proc()
+            self._proc.kill()
+    else:
+        def send_signal(self, signal):
+            self._check_proc()
+            try:
+                os.kill(self._proc.pid, signal)
+            except ProcessLookupError:
+                pass
 
-    def terminate(self):
-        self.send_signal(signal.SIGTERM)
+        def terminate(self):
+            self.send_signal(signal.SIGTERM)
 
-    def kill(self):
-        self.send_signal(signal.SIGKILL)
+        def kill(self):
+            self.send_signal(signal.SIGKILL)
 
     async def _connect_pipes(self, waiter):
         try: