Allow nested event loops

Author: sanjayprabhu

pyproject.toml

@@ -41,6 +41,7 @@ build = [
     # guarded with optional_import() calls.
     "virtualenv>=20.4",
     "PyYAML>=6.0",
+    "nest-asyncio>=1.6.0"
 ]
 test = [
     "isolate[build]",

src/isolate/connections/grpc/agent.py

@@ -252,4 +252,10 @@ async def main() -> int:
 
 
 if __name__ == "__main__":
+    # The fal app sdk runs its own asyncio evet loop, so we need to patch asyncio
+    # here to allow nested event loops to avoid "loop is already running" errors.
+    import nest_asyncio
+
+    nest_asyncio.apply()
+
     asyncio.run(main())