fix(annotation): make execution_context.run() have specific annotation

examples/amazon_s3_embedding/main.py

@@ -101,7 +101,16 @@ def _main() -> None:
     pool = ConnectionPool(os.getenv("COCOINDEX_DATABASE_URL"))
 
     amazon_s3_text_embedding_flow.setup()
-    with cocoindex.FlowLiveUpdater(amazon_s3_text_embedding_flow):
+    with cocoindex.FlowLiveUpdater(amazon_s3_text_embedding_flow) as updater:
+        updater.abort()
+        updater.wait()
+
+        while True:
+            updates = updater.next_status_updates()
+            print(f"Updates: {updates}")
+            if not updates.active_sources:
+                break
+
         # Run queries in a loop to demonstrate the query capabilities.
         while True:
             query = input("Enter search query (or Enter to quit): ")

python/cocoindex/flow.py

@@ -879,10 +879,7 @@ def update_all_flows(
     """
     Update all flows.
     """
-    return cast(
-        dict[str, _engine.IndexUpdateInfo],
-        execution_context.run(update_all_flows_async(options)),
-    )
+    return execution_context.run(update_all_flows_async(options))
 
 
 async def update_all_flows_async(
@@ -1037,7 +1034,7 @@ def eval(self, *args: Any, **kwargs: Any) -> T:
         """
         Evaluate the transform flow.
         """
-        return cast(T, execution_context.run(self.eval_async(*args, **kwargs)))
+        return execution_context.run(self.eval_async(*args, **kwargs))
 
     async def eval_async(self, *args: Any, **kwargs: Any) -> T:
         """

python/cocoindex/runtime.py

@@ -5,7 +5,10 @@
 
 import threading
 import asyncio
-from typing import Any, Coroutine
+from typing import Any, Coroutine, TypeVar
+
+
+T = TypeVar("T")
 
 
 class _ExecutionContext:
@@ -26,7 +29,7 @@ def event_loop(self) -> asyncio.AbstractEventLoop:
                 ).start()
             return self._event_loop
 
-    def run(self, coro: Coroutine[Any, Any, Any]) -> Any:
+    def run(self, coro: Coroutine[Any, Any, T]) -> T:
         """Run a coroutine in the event loop, blocking until it finishes. Return its result."""
         return asyncio.run_coroutine_threadsafe(coro, self.event_loop).result()