fix a bug in assert_grid_correct_after_powerflow

CHANGELOG.rst

@@ -24,9 +24,6 @@ TODO HVDC in Jacobian (see pandapower)
 
 [0.9.0] 2024-07-xx
 --------------------------
-- TODO test for clang 18 and gcc 14
-- TODO : numpy 2. compat (includes a mode without pandapower)
-
 - [BREAKING] the way to initialize lightsim2grid `GridModel` now does not require
   pandapower (you can initialize it with pypowsybl if you want). To make it both
   cleaner and clearer the function `lightsim2grid.gridmodel.init` has been removed.
@@ -81,14 +78,19 @@ gridmodel.get_Bf()                  gridmodel.get_Bf_solver()
   on some (rare) cases. Now an exception is thrown.
 - [FIXED] basic backward compatibility is ensured and tested for legacy grid2op >= 0.9.1.post1
   Not all features are tested and only 1.x versions are tested 
-  (ie 1.1 or 1.2 but not 1.2.1, 1.2.2, 1.2.3 etc.)
+  (ie 1.1 or 1.2 but not 1.2.1, 1.2.2, 1.2.3 etc.) and only for python 3.11
 - [FIXED] a bug when using `LightSimBackend` with some old (but not too old) grid2op
   versions.
 - [ADDED] it is now possible to deactivate the support for shunts by 
   subclassing the LightSimBackend class and setting the `shunts_data_available`
   to `False`
 - [IMPROVED] in the `ContingencyAnalysis` class, the underlying cpp model will now
   perform an initial powerflow.
+- [IMPROVED] distributed wheels are now compiled (whenever possible) with numpy 2. 
+  This makes them compatible with both numpy 1.xx and numpy 2.yy versions.
+- [IMPROVED] tests are now performed when lightsim2grid is compiled with 
+  the latest clang (18) and gcc (14)
+  versions on the CI
 
 [0.8.2.post1] 2024-04-xx
 --------------------------

lightsim2grid/lightSimBackend.py

@@ -978,11 +978,15 @@ def assert_grid_correct_after_powerflow(self) -> None:
         except TypeError as exc_:
             _init_action_to_set = self._get_action_to_set_deprecated()
         self._init_action_to_set += _init_action_to_set
-        assert np.isfinite(self.prod_pu_to_kv).all()
-        assert np.isfinite(self.load_pu_to_kv).all()
-        assert np.isfinite(self.lines_or_pu_to_kv).all()
-        assert np.isfinite(self.lines_ex_pu_to_kv).all()
-        if self.__has_storage and self.n_storage > 0:
+        if self.prod_pu_to_kv is not None:
+            assert np.isfinite(self.prod_pu_to_kv).all()
+        if self.load_pu_to_kv is not None:
+            assert np.isfinite(self.load_pu_to_kv).all()
+        if self.lines_or_pu_to_kv is not None:
+            assert np.isfinite(self.lines_or_pu_to_kv).all()
+        if self.lines_ex_pu_to_kv is not None:
+            assert np.isfinite(self.lines_ex_pu_to_kv).all()
+        if self.__has_storage and self.n_storage > 0 and self.storage_pu_to_kv is not None:
             assert np.isfinite(self.storage_pu_to_kv).all()
 
     def _get_action_to_set_deprecated(self):