Fix several bugs related to MilvusClient (#1923)

Signed-off-by: zhenshan.cao <[email protected]>

pymilvus/client/grpc_handler.py

@@ -898,7 +898,9 @@ def describe_alias(self, alias: str, timeout: Optional[float] = None, **kwargs):
 
     @retry_on_rpc_failure()
     def list_aliases(self, collection_name: str, timeout: Optional[float] = None, **kwargs):
-        check_pass_param(collection_name=collection_name, timeout=timeout)
+        check_pass_param(timeout=timeout)
+        if collection_name:
+            check_pass_param(collection_name=collection_name)
         request = Prepare.list_aliases_request(collection_name, kwargs.get("db_name", ""))
         rf = self._stub.ListAliases.future(request, timeout=timeout)
         response = rf.result()

pymilvus/milvus_client/milvus_client.py

@@ -828,7 +828,7 @@ def get_partition_stats(
         result = {stat.key: stat.value for stat in ret}
         if "row_count" in result:
             result["row_count"] = int(result["row_count"])
-        return
+        return result
 
     def create_user(self, user_name: str, password: str, timeout: Optional[float] = None, **kwargs):
         conn = self._get_connection()