Add sample to READMEs, update sample to include list_activities and count_activities

Author: yuandrew

README.md

@@ -55,6 +55,8 @@ Some examples require extra dependencies. See each sample's directory for specif
   * [hello_search_attributes](hello/hello_search_attributes.py) - Start workflow with search attributes then change
     while running.
   * [hello_signal](hello/hello_signal.py) - Send signals to a workflow.
+  * [hello standalone activity](hello/hello_standalone_activity.py) - Execute an activity from outside of a workflow.
+  * [hello update](hello/hello_update.py) - Send a request to and a response from a client to a workflow execution.
 <!-- Keep this list in alphabetical order -->
 * [activity_worker](activity_worker) - Use Python activities from a workflow in another language.
 * [batch_sliding_window](batch_sliding_window) - Batch processing with a sliding window of child workflows.

hello/README.md

@@ -44,7 +44,8 @@ Replace `hello/hello_activity.py` in the command with any other example filename
 * [hello_search_attributes](hello_search_attributes.py) - Start workflow with search attributes then change while
   running.
 * [hello_signal](hello_signal.py) - Send signals to a workflow.
-* [hello_update](hello_update.py) - Send a request to and a response from a client to a workflow execution.
+* [hello standalone activity](hello_standalone_activity.py) - Execute an activity from outside of a workflow.
+* [hello_update](hello_update.py) - **Send a request to and a response from a client to a workflow execution.**
 
 Note: To enable the workflow update, set the `frontend.enableUpdateWorkflowExecution` dynamic config value to true.
 

hello/hello_standalone_activity.py

@@ -38,6 +38,18 @@ async def my_client_code(client: Client):
     )
     print(f"Activity result: {result}")
 
+    activities = client.list_activities(
+        query="TaskQueue = 'hello-standalone-activity-task-queue'"
+    )
+    print("ListActivity results:")
+    async for info in activities:
+        print(f"\tActivityID: {info.activity_id}, Type: {info.activity_type}, Status: {info.status}")
+
+    count_result = await client.count_activities(
+        query="TaskQueue = 'hello-standalone-activity-task-queue'"
+    )
+    print(f"Total activities: {count_result.count}")
+
 
 async def main():
     # Uncomment the lines below to see logging output