2 small fixes

CHANGELOG.rst

@@ -71,6 +71,9 @@ Next release
 - [FIXED] an issue in the backend: if the backend failed to be
   created the `_grid` attribute was set to `None` and not set back to
 - [FIXED] the `self.skip_if_needed()` was missing for one of the test suite.
+- [FIXED] an error in the descirption of the `educ_case14_storage` environment
+  (wrong sign for the slack generator)
+- [IMPROVED] error message when forecasts are not correctly set-up
 
 [1.10.3] - 2024-07-12
 -------------------------

grid2op/Chronics/gridStateFromFileWithForecasts.py

@@ -71,10 +71,10 @@ def __init__(
         self._order_prod_p_forecasted = None
         self._order_prod_v_forecasted = None
         self._data_already_in_mem = False  # says if the "main" value from the base class had to be reloaded (used for chunk)
+
         self._nb_forecast = len(h_forecast)
         self._h_forecast = copy.deepcopy(h_forecast)
         self._check_hs_consistent(self._h_forecast, time_interval)
-
         # init base class
         GridStateFromFile.__init__(
             self,
@@ -83,7 +83,7 @@ def __init__(
             time_interval=time_interval,
             max_iter=max_iter,
             chunk_size=chunk_size,
-        )
+        )        
 
     def _clear(self):
         super()._clear()
@@ -106,7 +106,9 @@ def _check_hs_consistent(self, h_forecast, time_interval):
             if prev.total_seconds() // 60 != h:
                 raise ChronicsError("For now you cannot build non contiuguous forecast. "
                                     "Forecast should look like [5, 10, 15, 20] "
-                                    "but not [10, 15, 20] (missing h=5mins) or [5, 10, 20] (missing h=15)")
+                                    "but not [10, 15, 20] (missing h=5mins) or [5, 10, 20] "
+                                    f"(missing h=15 in this example). Missing h={prev} "
+                                    f"at position {i}, found {h}")
 
     def _get_next_chunk_forecasted(self):
         load_p = None

grid2op/data/educ_case14_storage/grid.json

@@ -137,7 +137,7 @@
     "gen": {
       "_module": "pandas.core.frame",
       "_class": "DataFrame",
-      "_object": "{\"columns\":[\"name\",\"bus\",\"p_mw\",\"vm_pu\",\"sn_mva\",\"min_q_mvar\",\"max_q_mvar\",\"scaling\",\"slack\",\"in_service\",\"type\",\"controllable\",\"min_p_mw\",\"max_p_mw\",\"slack_weight\",\"power_station_trafo\"],\"index\":[0,1,2,3,4,5],\"data\":[[null,1,40.0,1.045,null,-40.0,50.0,1.0,false,true,null,true,0.0,140.0,0.0,null],[null,2,0.0,1.01,null,0.0,40.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[null,5,0.0,1.07,null,-6.0,24.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[null,5,0.0,1.07,null,-6.0,24.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[null,7,0.0,1.09,null,-6.0,24.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[\"gen_0_5\",0,-219.0,1.06,null,-9999.0,9999.0,1.0,true,true,null,true,null,null,1.0,null]]}",
+      "_object": "{\"columns\":[\"name\",\"bus\",\"p_mw\",\"vm_pu\",\"sn_mva\",\"min_q_mvar\",\"max_q_mvar\",\"scaling\",\"slack\",\"in_service\",\"type\",\"controllable\",\"min_p_mw\",\"max_p_mw\",\"slack_weight\",\"power_station_trafo\"],\"index\":[0,1,2,3,4,5],\"data\":[[null,1,40.0,1.045,null,-40.0,50.0,1.0,false,true,null,true,0.0,140.0,0.0,null],[null,2,0.0,1.01,null,0.0,40.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[null,5,0.0,1.07,null,-6.0,24.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[null,5,0.0,1.07,null,-6.0,24.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[null,7,0.0,1.09,null,-6.0,24.0,1.0,false,true,null,true,0.0,100.0,0.0,null],[\"gen_0_5\",0,219.0,1.06,null,-9999.0,9999.0,1.0,true,true,null,true,null,null,1.0,null]]}",
       "orient": "split",
       "dtype": {
         "name": "object",
@@ -1763,4 +1763,4 @@
     },
     "user_pf_options": {}
   }
-}
+}