adressing issue rte-france#527

.gitignore

@@ -391,6 +391,7 @@ _profiling/profile.json
 actspace_converter.py
 grid2op/data_test/input_data_local/
 test_sim2real_battery.py
+grid2op/tests/list_test_debug
 
 # profiling files
 **.prof

CHANGELOG.rst

@@ -37,7 +37,10 @@ Change Log
 - [FIXED] issue https://github.com/rte-france/Grid2Op/issues/446
 - [FIXED] issue https://github.com/rte-france/Grid2Op/issues/523 by having a "_BackendAction" folder instead of a file
 - [FIXED] issue https://github.com/rte-france/Grid2Op/issues/522 and adding back certain notebooks to the CI
-- [FIXED] and issue when disconnecting loads / generators on msot recent pandas version
+- [FIXED] an issue when disconnecting loads / generators on msot recent pandas version
+- [FIXED] issue https://github.com/rte-france/Grid2Op/issues/527 : now do nothing action are detected in 
+  `act.as_serializable_dict()` AND weird do nothing action can be made through the action space
+  (`env.action_space({"change_bus": {}})` is not ambiguous, though might not be super efficient...)
 
 [1.9.4] - 2023-09-04
 ---------------------

grid2op/Action/baseAction.py

@@ -612,22 +612,32 @@ def as_serializable_dict(self) -> dict:
             res["raise_alert"] = [
                 int(id_) for id_, val in enumerate(self._raise_alert) if val
             ]
+            if not res["raise_alert"]:
+                del res["raise_alert"]
+
         if self._modif_alarm:
             res["raise_alarm"] = [
                 int(id_) for id_, val in enumerate(self._raise_alarm) if val
             ]
+            if not res["raise_alarm"]:
+                del res["raise_alarm"]
+
         if self._modif_change_bus:
             res["change_bus"] = {}
             self._aux_serialize_add_key_change("load_change_bus", "loads_id", res["change_bus"])
             self._aux_serialize_add_key_change("gen_change_bus", "generators_id", res["change_bus"])
             self._aux_serialize_add_key_change("line_or_change_bus", "lines_or_id", res["change_bus"])
             self._aux_serialize_add_key_change("line_ex_change_bus", "lines_ex_id", res["change_bus"])
             self._aux_serialize_add_key_change("storage_change_bus", "storages_id", res["change_bus"])
+            if not res["change_bus"]:
+                del res["change_bus"]
 
         if self._modif_change_status:
             res["change_line_status"] = [
                 int(id_) for id_, val in enumerate(self._switch_line_status) if val
             ]
+            if not res["change_line_status"]:
+                del res["change_line_status"]
 
         # int elements
         if self._modif_set_bus:
@@ -637,13 +647,17 @@ def as_serializable_dict(self) -> dict:
             self._aux_serialize_add_key_set("line_or_set_bus", "lines_or_id", res["set_bus"])
             self._aux_serialize_add_key_set("line_ex_set_bus", "lines_ex_id", res["set_bus"])
             self._aux_serialize_add_key_set("storage_set_bus", "storages_id", res["set_bus"])
+            if not res["set_bus"]:
+                del res["set_bus"]
 
         if self._modif_set_status:
             res["set_line_status"] = [
                 (int(id_), int(val))
                 for id_, val in enumerate(self._set_line_status)
                 if val != 0
             ]
+            if not res["set_line_status"]:
+                del res["set_line_status"]
 
         # float elements
         if self._modif_redispatch:
@@ -652,18 +666,26 @@ def as_serializable_dict(self) -> dict:
                 for id_, val in enumerate(self._redispatch)
                 if val != 0.0
             ]
+            if not res["redispatch"]:
+                del res["redispatch"]
+
         if self._modif_storage:
             res["set_storage"] = [
                 (int(id_), float(val))
                 for id_, val in enumerate(self._storage_power)
                 if val != 0.0
             ]
+            if not res["set_storage"]:
+                del res["set_storage"]
+
         if self._modif_curtailment:
             res["curtail"] = [
                 (int(id_), float(val))
                 for id_, val in enumerate(self._curtail)
                 if val != -1
             ]
+            if not res["curtail"]:
+                del res["curtail"]
 
         # more advanced options
         if self._modif_inj:
@@ -1787,7 +1809,7 @@ def _digest_setbus(self, dict_):
             if dict_["set_bus"] is None:
                 # no real action has been made
                 return
-
+            
             if isinstance(dict_["set_bus"], dict):
                 ddict_ = dict_["set_bus"]
                 handled = False
@@ -1809,6 +1831,9 @@ def _digest_setbus(self, dict_):
                 if "substations_id" in ddict_:
                     self.sub_set_bus = ddict_["substations_id"]
                     handled = True
+                if ddict_ == {}:
+                    handled = True
+                    # weird way to do nothing but hey, how am I to judge ?
                 if not handled:
                     msg = 'Invalid way to set the topology. When dict_["set_bus"] is a dictionary it should have'
                     msg += (
@@ -1849,6 +1874,9 @@ def _digest_change_bus(self, dict_):
                 if "substations_id" in ddict_:
                     self.sub_change_bus = ddict_["substations_id"]
                     handled = True
+                if ddict_ == {}:
+                    handled = True
+                    # weird way to do nothing but hey, how am I to judge ?
                 if not handled:
                     msg = 'Invalid way to change the topology. When dict_["set_bus"] is a dictionary it should have'
                     msg += (

grid2op/tests/test_issue_511.py

@@ -21,6 +21,9 @@ def setUp(self) -> None:
             test=True
         )
         return super().setUp()
+
+    def tearDown(self):
+        self.env.close()
 
     def test_issue_set_bus(self):
         act = {

grid2op/tests/test_issue_527.py

@@ -0,0 +1,44 @@
+
+# Copyright (c) 2023, RTE (https://www.rte-france.com)
+# See AUTHORS.txt
+# This Source Code Form is subject to the terms of the Mozilla Public License, version 2.0.
+# If a copy of the Mozilla Public License, version 2.0 was not distributed with this file,
+# you can obtain one at http://mozilla.org/MPL/2.0/.
+# SPDX-License-Identifier: MPL-2.0
+# This file is part of Grid2Op, Grid2Op a testbed platform to model sequential decision making in power systems.
+
+import grid2op
+import warnings
+import unittest
+import pdb
+
+
+class Issue527Tester(unittest.TestCase):
+    def setUp(self) -> None:
+        with warnings.catch_warnings():
+            warnings.filterwarnings("ignore")
+            self.env = grid2op.make(
+            "l2rpn_case14_sandbox",
+            test=True
+        )
+        self.env.seed(0)
+        return super().setUp()
+
+    def tearDown(self):
+        self.env.close()
+
+    def test_action_space_sampling(self) -> None:
+        obs = self.env.reset()
+        for ind in range(1000):
+            act = self.env.action_space.sample()
+            act_dict = act.as_serializable_dict()
+            self.env.action_space(act_dict)       
+
+    def test_do_nothing_act_weird(self) -> None:
+        obs = self.env.reset()
+        self.env.action_space({"change_bus": {}})       
+        self.env.action_space({"set_bus": {}})       
+
+
+if __name__ == '__main__':
+    unittest.main()