Refactor try-except in Field.deep_copy()

Author: PProfizi

src/ansys/dpf/core/field.py

@@ -943,20 +943,22 @@ def deep_copy(self, server=None):
             f._data_pointer = self._data_pointer
         except Exception as e:
             raise e
-        try:
-            f.meshed_region = self.meshed_region.deep_copy(server=server)
-        except DPFServerException as e:
-            if "the field doesn't have this support type" in str(e):
-                pass
-            else:
-                raise e
-        try:
-            f.time_freq_support = self.time_freq_support.deep_copy(server=server)
-        except DPFServerException as e:
-            if "the field doesn't have this support type" in str(e):
-                pass
-            else:
-                raise e
+        if self.meshed_region:
+            try:
+                f.meshed_region = self.meshed_region.deep_copy(server=server)
+            except DPFServerException as e:
+                if "the field doesn't have this support type" in str(e):
+                    pass
+                else:
+                    raise e
+        if self.time_freq_support:
+            try:
+                f.time_freq_support = self.time_freq_support.deep_copy(server=server)
+            except DPFServerException as e:
+                if "the field doesn't have this support type" in str(e):
+                    pass
+                else:
+                    raise e
 
         return f