a bit better examples

examples/building_models/03-building-models.py

@@ -5,7 +5,7 @@ import stormpy.examples
 import stormpy.examples.files
 
 
-def example_building_models_01():
+def example_building_models_03():
     path = stormpy.examples.files.prism_pdtmc_brp
     prism_program = stormpy.parse_prism_program(path)
     formula_str = "P=? [F s=5]"
@@ -27,4 +27,4 @@ def example_building_models_01():
 
 
 if __name__ == '__main__':
-    example_building_models_01()
+    example_building_models_03()

examples/parametric_models/03-parametric-models.py

@@ -7,6 +7,10 @@ import stormpy.examples
 import stormpy.examples.files
 
 def example_parametric_models_03():
+    if not config.storm_with_pars:
+        print("Support parameters is missing. Try building storm-pars.")
+        return
+
     path = stormpy.examples.files.prism_dtmc_brp
     prism_program = stormpy.parse_prism_program(path)