Merge pull request #735 from nschloe/fix-get-cells-type-empty

Fix get cells type empty

Author: nschloe

README.md

@@ -148,7 +148,7 @@ If you have downloaded a binary version of ParaView, you may proceed as follows.
  * Install meshio
  * Open ParaView
  * Find the file `paraview-meshio-plugin.py` of your meshio installation (on Linux:
-   `~/.local/paraview-plugins/`) and load it under _Tools / Manage Plugins / Load New_
+   `~/.local/share/paraview/plugins/`) and load it under _Tools / Manage Plugins / Load New_
  * _Optional:_ Activate _Auto Load_
 
 You can now open all meshio-supported files in ParaView.

meshio/__about__.py

@@ -1,4 +1,4 @@
-__version__ = "4.0.5"
+__version__ = "4.0.6"
 __original_author__ = "Nico Schlömer"
 __original_author_email__ = "[email protected]"
 __copyright__ = "Copyright (c) 2015-2020 meshio developers"

meshio/_mesh.py

@@ -121,6 +121,8 @@ def write(self, path_or_buf, file_format=None, **kwargs):
         write(path_or_buf, self, file_format, **kwargs)
 
     def get_cells_type(self, cell_type):
+        if not any(c.type == cell_type for c in self.cells):
+            return numpy.array([], dtype=int)
         return numpy.concatenate([c.data for c in self.cells if c.type == cell_type])
 
     def get_cell_data(self, name, cell_type):

setup.py

@@ -48,7 +48,7 @@
         "Programming Language :: Python :: 3.8",
         "Topic :: Scientific/Engineering",
     ],
-    data_files=[("paraview-plugins", ["tools/paraview-meshio-plugin.py"])],
+    data_files=[("share/paraview/plugins/", ["tools/paraview-meshio-plugin.py"])],
     entry_points={
         "console_scripts": [
             "meshio-ascii = meshio._cli:ascii",