#422: try putting vttv import in a try/except block for ci

Author: cwschilly

src/lbaf/Applications/LBAF_app.py

@@ -6,7 +6,11 @@
 import importlib
 import yaml
 
-import vttv
+try:
+    import vttv
+    using_vttv = True
+except ModuleNotFoundError:
+    using_vttv = False
 
 # pylint:disable=C0413:wrong-import-position
 # Use lbaf module from source if lbaf package is not installed
@@ -572,33 +576,34 @@ def run(self):
             ]
 
             # Call vttv visualization
-            self.__logger.info("Calling vt-tv")
-
-            # Serialize data to JSON-formatted string
-            self.__rank_phases = {}
-            for p in phases.values():
-                for r in p.get_ranks():
-                    self.__rank_phases.setdefault(r.get_id(), {})
-                    self.__rank_phases[r.get_id()][p.get_id()] = r
-
-            ranks_json_str = []
-            for i in range(len(self.__rank_phases.items())):
-                ranks_json_str.append(self.__json_writer._json_serializer((i, self.__rank_phases[i])))
-
-            vttv_params = {
-                "x_ranks": self.__parameters.grid_size[0],
-                "y_ranks": self.__parameters.grid_size[1],
-                "z_ranks": self.__parameters.grid_size[2],
-                "object_jitter": self.__parameters.object_jitter,
-                "rank_qoi": self.__parameters.rank_qoi,
-                "object_qoi": self.__parameters.object_qoi,
-                "save_meshes": self.__parameters.save_meshes,
-                "force_continuous_object_qoi": self.__parameters.continuous_object_qoi,
-                "output_visualization_dir": self.__parameters.output_dir,
-                "output_visualization_file_stem": self.__parameters.output_file_stem
-            }
-            num_ranks = self.__parameters.grid_size[0] * self.__parameters.grid_size[1] * self.__parameters.grid_size[2]
-            vttv.tv_from_json(ranks_json_str, str(vttv_params), num_ranks)
+            if using_vttv:
+                self.__logger.info("Calling vt-tv")
+
+                # Serialize data to JSON-formatted string
+                self.__rank_phases = {}
+                for p in phases.values():
+                    for r in p.get_ranks():
+                        self.__rank_phases.setdefault(r.get_id(), {})
+                        self.__rank_phases[r.get_id()][p.get_id()] = r
+
+                ranks_json_str = []
+                for i in range(len(self.__rank_phases.items())):
+                    ranks_json_str.append(self.__json_writer._json_serializer((i, self.__rank_phases[i])))
+
+                vttv_params = {
+                    "x_ranks": self.__parameters.grid_size[0],
+                    "y_ranks": self.__parameters.grid_size[1],
+                    "z_ranks": self.__parameters.grid_size[2],
+                    "object_jitter": self.__parameters.object_jitter,
+                    "rank_qoi": self.__parameters.rank_qoi,
+                    "object_qoi": self.__parameters.object_qoi,
+                    "save_meshes": self.__parameters.save_meshes,
+                    "force_continuous_object_qoi": self.__parameters.continuous_object_qoi,
+                    "output_visualization_dir": self.__parameters.output_dir,
+                    "output_visualization_file_stem": self.__parameters.output_file_stem
+                }
+                num_ranks = self.__parameters.grid_size[0] * self.__parameters.grid_size[1] * self.__parameters.grid_size[2]
+                vttv.tvFromJson(ranks_json_str, str(vttv_params), num_ranks)
 
         # Report on rebalanced phase when available
         if rebalanced_phase: