Update tasks API (#659)

* Update cat.py

* Update tasks.py

Author: nfsec

elasticsearch/client/cat.py

@@ -396,8 +396,8 @@ def snapshots(self, repository=None, params=None):
         return self.transport.perform_request('GET', _make_path('_cat',
             'snapshots', repository), params=params)
 
-    @query_params('actions', 'detailed', 'format', 'h', 'help', 'node_id',
-        'parent_node', 'parent_task', 's', 'v')
+    @query_params('actions', 'detailed', 'format', 'h', 'help', 'nodes',
+        'parent_task_id', 's', 'v')
     def tasks(self, params=None):
         """
 
@@ -409,12 +409,11 @@ def tasks(self, params=None):
         :arg format: a short version of the Accept header, e.g. json, yaml
         :arg h: Comma-separated list of column names to display
         :arg help: Return help information, default False
-        :arg node_id: A comma-separated list of node IDs or names to limit the
+        :arg nodes: A comma-separated list of node IDs or names to limit the
             returned information; use `_local` to return information from the
             node you're connecting to, leave empty to get information from all
             nodes
-        :arg parent_node: Return tasks with specified parent node.
-        :arg parent_task: Return tasks with specified parent task id. Set to -1
+        :arg parent_task_id: Return tasks with specified parent task id. Set to -1
             to return all.
         :arg s: Comma-separated list of column names or column aliases to sort
             by

elasticsearch/client/tasks.py

@@ -1,9 +1,9 @@
 from .utils import NamespacedClient, query_params, _make_path, SKIP_IN_PATH
 
 class TasksClient(NamespacedClient):
-    @query_params('actions', 'detailed', 'group_by', 'node_id', 'parent_node',
-        'parent_task', 'wait_for_completion')
-    def list(self, task_id=None, params=None):
+    @query_params('actions', 'detailed', 'group_by', 'nodes', 'parent_node',
+        'parent_task_id', 'wait_for_completion')
+    def list(self, params=None):
         """
         `<http://www.elastic.co/guide/en/elasticsearch/reference/current/tasks.html>`_
 
@@ -13,20 +13,20 @@ def list(self, task_id=None, params=None):
         :arg detailed: Return detailed task information (default: false)
         :arg group_by: Group tasks by nodes or parent/child relationships,
             default 'nodes', valid choices are: 'nodes', 'parents'
-        :arg node_id: A comma-separated list of node IDs or names to limit the
+        :arg nodes: A comma-separated list of node IDs or names to limit the
             returned information; use `_local` to return information from the
             node you're connecting to, leave empty to get information from all
             nodes
         :arg parent_node: Return tasks with specified parent node.
-        :arg parent_task: Return tasks with specified parent task id
+        :arg parent_task_id: Return tasks with specified parent task id
             (node_id:task_number). Set to -1 to return all.
         :arg wait_for_completion: Wait for the matching tasks to complete
             (default: false)
         """
         return self.transport.perform_request('GET', _make_path('_tasks',
             task_id), params=params)
 
-    @query_params('actions', 'node_id', 'parent_node', 'parent_task')
+    @query_params('actions', 'nodes', 'parent_task_id')
     def cancel(self, task_id=None, params=None):
         """
 
@@ -36,12 +36,11 @@ def cancel(self, task_id=None, params=None):
             (node_id:task_number)
         :arg actions: A comma-separated list of actions that should be
             cancelled. Leave empty to cancel all.
-        :arg node_id: A comma-separated list of node IDs or names to limit the
+        :arg nodes: A comma-separated list of node IDs or names to limit the
             returned information; use `_local` to return information from the
             node you're connecting to, leave empty to get information from all
             nodes
-        :arg parent_node: Cancel tasks with specified parent node.
-        :arg parent_task: Cancel tasks with specified parent task id
+        :arg parent_task_id: Cancel tasks with specified parent task id
             (node_id:task_number). Set to -1 to cancel all.
         """
         return self.transport.perform_request('POST', _make_path('_tasks',