reintroduce dune-corepy testing for existence of add_python_target

Also removed _create.py script moving the registry into the __init__ file

CMakeLists.txt

@@ -43,7 +43,9 @@ add_subdirectory(lib)
 add_subdirectory(examples EXCLUDE_FROM_ALL)
 add_subdirectory(utils)
 
-#add_subdirectory(python)
+if (COMMAND add_python_target)
+  add_subdirectory(python)
+endif()
 
 # finalize the dune project, e.g., generate config.h etc.
 finalize_dune_project(GENERATE_CONFIG_H_CMAKE)

python/dune/alugrid/CMakeLists.txt

 add_python_targets(alugrid
   __init__
-  _create
   _grids
 )

python/dune/alugrid/__init__.py

 from ._grids import *
+
+registry = dict()
+registry["grid"] = {
+        "ALU"        : aluGrid,
+        "ALUConform" : aluConformGrid,
+        "ALUCube" :    aluCubeGrid,
+        "ALUSimplex" : aluSimplexGrid,
+    }

python/dune/alugrid/_create.py

-from ._grids import *
-
-registry = dict()
-registry["grid"] = {
-        "ALU"        : aluGrid,
-        "ALUConform" : aluConformGrid,
-        "ALUCube" :    aluCubeGrid,
-        "ALUSimplex" : aluSimplexGrid,
-    }

python/dune/alugrid/alu.py

-from __future__ import absolute_import, division, print_function, unicode_literals
-
-from dune.grid.grid_generator import module
-
-def create(constructor, dimgrid, dimworld=None, elementType=None, **parameters):
-
-    if not dimworld:
-        dimworld = dimgrid
-    if not elementType:
-        elementType = parameters.pop("type")
-    refinement = parameters["refinement"]
-    if refinement == "conforming":
-        refinement="Dune::conforming"
-    elif refinement == "nonconforming":
-        refinement="Dune::nonconforming"
-
-    if not (2<=dimworld and dimworld<=3):
-        raise KeyError(\
-            "Parameter error in ALUGrid with "+
-            "dimworld=" + str(dimworld) + ": " +\
-            "dimworld has to be either 2 or 3")
-    if not (2<=dimgrid and dimgrid<=3):
-        raise KeyError(\
-            "Parameter error in ALUGrid with "+
-            "dimgrid=" + str(dimgrid) + ": " +\
-            "dimgrid has to be either 2 or 3")
-    if not (dimgrid==dimworld or dimgrid+1==dimworld):
-        raise KeyError(\
-            "Parameter error in ALUGrid with "+
-            "dimworld=" + str(dimworld) + " and dimgrid=" + str(dimgrid) + ": " +\
-            "dimworld has to be either equal to dimgrid or "+
-            "dimworld has to be equal to dimgrid+1")
-    if refinement=="Dune::conforming" and elementType=="Dune::cube":
-        raise KeyError(\
-            "Parameter error in ALUGrid with "+
-            "refinement=" + refinement + " and type=" + elementType + ": " +\
-            "conforming refinement is only available with simplex element type")
-
-    typeName = "Dune::ALUGrid< " + str(dimgrid) + ", " + str(dimworld) + ", " +\
-               elementType + ", " + refinement + " >"
-    includes = [ "dune/alugrid/grid.hh", "dune/alugrid/dgf.hh" ]
-    gridModule = module(includes, typeName)
-    return gridModule.LeafGrid( gridModule.reader(constructor) )
-
-if __name__ == "__main__":
-    import doctest
-    doctest.testmod(optionflags=doctest.ELLIPSIS)

python/dune/alugrid/aluconform.py

-from __future__ import absolute_import, division, print_function, unicode_literals
-
-from dune.grid.grid_generator import module
-
-from . import alu
-
-def create(constructor, dimgrid, dimworld=None, **parameters):
-
-    parameters["type"] = "Dune::simplex"
-    parameters["refinement"] = "Dune::conforming"
-    return alu.create(constructor, dimgrid, dimworld, **parameters)
-
-if __name__ == "__main__":
-    import doctest
-    doctest.testmod(optionflags=doctest.ELLIPSIS)

python/dune/alugrid/alucube.py

-from __future__ import absolute_import, division, print_function, unicode_literals
-
-from dune.grid.grid_generator import module
-
-from . import alu
-
-def create(constructor, dimgrid, dimworld=None,
-        **parameters):
-
-    parameters["type"] = "Dune::cube"
-    parameters["refinement"] = "Dune::nonconforming"
-    return alu.create(constructor, dimgrid, dimworld, **parameters)
-
-if __name__ == "__main__":
-    import doctest
-    doctest.testmod(optionflags=doctest.ELLIPSIS)

python/dune/alugrid/alusimplex.py

-from __future__ import absolute_import, division, print_function, unicode_literals
-
-from dune.grid.grid_generator import module
-
-from . import alu
-
-def create(constructor, dimgrid, dimworld=None, refinement="Dune::nonconforming",
-        **parameters):
-
-    parameters["type"] = "Dune::simplex"
-    parameters["refinement"] = refinement
-    return alu.create(constructor, dimgrid, dimworld, **parameters)
-
-if __name__ == "__main__":
-    import doctest
-    doctest.testmod(optionflags=doctest.ELLIPSIS)