safe print dpf entity (#125)

Author: cbellot000

ansys/dpf/core/core.py

@@ -429,9 +429,12 @@ def _description(self, dpf_entity_message):
         -------
            description : str
         """
-        request = base_pb2.DescribeRequest()
-        request.dpf_type_id = dpf_entity_message.id
-        return self._stub.Describe(request).description
+        try:
+            request = base_pb2.DescribeRequest()
+            request.dpf_type_id = dpf_entity_message.id
+            return self._stub.Describe(request).description
+        except:
+            return ""
 
     def _get_separator(self, path):
         s1 = len(path.split("\\"))

ansys/dpf/core/model.py

@@ -46,16 +46,10 @@ def __init__(self, data_sources=None, server=None):
         if server is None:
             server = dpf.core._global_server()
 
+        self._data_sources = data_sources
         self._server = server
-        self._metadata = Metadata(data_sources, self._server)
-        if misc.DYNAMIC_RESULTS:
-            try:
-                self._results = Results(self)
-            except Exception as e:
-                self._results = CommonResults(self)
-                LOG.debug(str(e))
-        else:
-            self._results = CommonResults(self)
+        self._metadata = None
+        self._results = None
 
     @property
     def metadata(self):
@@ -104,6 +98,8 @@ def metadata(self):
         'Metric (m, kg, N, s, V, A)'
 
         """
+        if not self._metadata:
+            self._metadata = Metadata(self._data_sources, self._server)
         return self._metadata
 
     @property
@@ -155,7 +151,14 @@ def results(self):
 
         """
         if not self._results:
-            return CommonResults(self)
+            if misc.DYNAMIC_RESULTS:
+                try:
+                    self._results = Results(self)
+                except Exception as e:
+                    self._results = CommonResults(self)
+                    LOG.debug(str(e))
+            else:
+                self._results = CommonResults(self)
         return self._results
 
     def __connect_op__(self, op):