clear lists, bump dev version

pyproject.toml

@@ -8,7 +8,7 @@ build-backend = "scikit_build_core.build"
 
 [project]
 name = "highspy"
-version = "1.7.1.dev1"
+version = "1.7.1.dev2"
 description = "A thin set of pybind11 wrappers to HiGHS"
 authors = [{ name = "HiGHS developers", email = "highsopt@gmail.com" }]
 readme = "README.md"

src/highspy/highs.py

@@ -121,6 +121,8 @@ def update(self):
 
         self._batch = highs_batch(self)
         print("DEBUG update(self): On  exit - current_batch_size = ", len(self._batch.obj))
+        self._vars.clear()
+        self._cons.clear()
 
     def val(self, var):
         return super().getSolution().col_value[var.index]
@@ -218,6 +220,7 @@ def allConstrDuals(self):
     # highspy binding to Highs::addVar
     def addVariable(self, lb = 0, ub = kHighsInf, obj = 0, type=HighsVarType.kContinuous, name = None, update = False):
         print("\nDEBUG addVariable: name = ", name, "; obj = ", obj, "; lb = ", lb, "; ub = ", ub, " with update = ", update)
+
         var = self._batch.add(obj, lb, ub, type, name, self)
         self._vars.append(var)
         # No longer acumulate a batch of variables so that addVariable