feat(python): auto-discover the activities in the class

Author: mrsimonemms

python/src/worker.py

@@ -5,25 +5,47 @@
 from workflows import HelloWorldWorkflow
 from activities import Activities
 import shared
+import inspect
 
 
 async def main():
     default_profile = ClientConfigProfile.load()
     connect_config = default_profile.to_client_connect_config()
 
     client = await Client.connect(**connect_config)
+
+    # Register the activities - you may need to inject dependencies in here
     activities = Activities()
 
     worker = Worker(
         client,
         task_queue=shared.TASK_QUEUE_NAME,
         workflows=[HelloWorldWorkflow],
-        activities=[activities.sayName],
+        activities=find_activities(activities),
     )
 
     print("Worker started.")
     await worker.run()
 
 
+# ---- auto-discovery helper ----
+_ACTIVITY_ATTR = "__temporal_activity_definition"  # set by @activity.defn
+
+
+def find_activities(obj):
+    """Return a list of bound methods on `obj` that are Temporal activities."""
+    acts = []
+    for _, member in inspect.getmembers(obj):
+        if callable(member) and is_activity_callable(member):
+            acts.append(member)  # bound method carries injected deps
+    return acts
+
+
+def is_activity_callable(attr) -> bool:
+    # Works for functions and bound methods
+    func = attr.__func__ if inspect.ismethod(attr) else attr
+    return hasattr(func, _ACTIVITY_ATTR)
+
+
 if __name__ == "__main__":
     asyncio.run(main())