[shortfin] Fix some issues blocking operation on Python 3.10. (#462)

With this unit tests appear to pass (I'm on a system with other issues
but appear unrelated).

shortfin/python/_shortfin/asyncio_bridge.py

@@ -5,10 +5,19 @@
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
 import asyncio
+import inspect
 
 from . import lib as sfl
 
 
+# Feature detect some versions where signatures changes.
+if "context" in inspect.signature(asyncio.Task).parameters:
+    # Python > 3.10
+    _ASYNCIO_TASK_HAS_CONTEXT = True
+else:
+    _ASYNCIO_TASK_HAS_CONTEXT = False
+
+
 class PyWorkerEventLoop(asyncio.AbstractEventLoop):
     def __init__(self, worker: sfl.local.Worker):
         self._worker = worker
@@ -17,8 +26,15 @@ def get_debug(self):
         # Requirement of asyncio.
         return False
 
-    def create_task(self, coro, *, name=None, context=None):
-        return asyncio.Task(coro, loop=self, name=name, context=context)
+    if _ASYNCIO_TASK_HAS_CONTEXT:
+
+        def create_task(self, coro, *, name=None, context=None):
+            return asyncio.Task(coro, loop=self, name=name, context=context)
+
+    else:
+
+        def create_task(self, coro, *, name=None):
+            return asyncio.Task(coro, loop=self, name=name)
 
     def create_future(self):
         return asyncio.Future(loop=self)

shortfin/python/shortfin_apps/sd/server.py

@@ -151,7 +151,7 @@ def get_modules(args):
             f"--model={modelname}",
             f"--iree-hal-target-device={args.device}",
             f"--iree-hip-target={args.target}",
-            f"--iree-compile-extra-args={" ".join(ireec_args)}",
+            f"--iree-compile-extra-args={' '.join(ireec_args)}",
         ]
         print("BUILDER INPUT:\n", " \ \n  ".join(builder_args))
         output = subprocess.check_output(builder_args).decode()