[Core]Fix get workrer table bug (#11516)

* fix get_worker_table bug

* fix lint

* fix comment

* remove actor table

* fix comment

* fix get alive worker

* remove unused python import

python/ray/__init__.py

@@ -110,6 +110,7 @@ __all__ = [
     "get_runtime_context",
     "actor",
     "actors",
+    "workers",
     "available_resources",
     "cancel",
     "cluster_resources",

python/ray/includes/global_state_accessor.pxi

@@ -112,7 +112,7 @@ cdef class GlobalStateAccessor:
     def get_worker_table(self):
         cdef c_vector[c_string] result
         with nogil:
-            self.inner.get().GetAllWorkerInfo()
+            result = self.inner.get().GetAllWorkerInfo()
         return result
 
     def get_worker_info(self, worker_id):

python/ray/state.py

@@ -876,6 +876,15 @@ def nodes():
     return state.node_table()
 
 
+def workers():
+    """Get a list of the workers in the cluster.
+
+    Returns:
+        Information about the Ray workers in the cluster.
+    """
+    return state.workers()
+
+
 def current_node_id():
     """Return the node id of the current node.
 

python/ray/tests/test_global_state.py

@@ -110,6 +110,14 @@ def test_global_state_actor_table(ray_start_regular):
     assert get_state() == dead_state
 
 
+def test_global_state_worker_table(ray_start_regular):
+
+    # Get worker table from gcs.
+    workers_data = ray.state.workers()
+
+    assert len(workers_data) == 1
+
+
 def test_global_state_actor_entry(ray_start_regular):
     @ray.remote
     class Actor: