Class VTKFile

python/dolfinx/io/utils.py:116–139

Interface to VTK files. VTK supports arbitrary order Lagrange finite elements for the geometry description. XDMF is the preferred format for geometry order <= 2.

class VTKFile(_cpp.io.VTKFile):
    """Interface to VTK files.

    VTK supports arbitrary order Lagrange finite elements for the
    geometry description. XDMF is the preferred format for geometry
    order <= 2.
    """

    def __enter__(self):
        """Enter context manager."""
        return self

    def __exit__(self, exception_type, exception_value, traceback):
        """Exit context manager and close file."""
        self.close()

    def write_mesh(self, mesh: Mesh, t: float = 0.0) -> None:
        """Write mesh to file for a given time."""
        self.write(mesh._cpp_object, t)

    def write_function(self, u: list[Function] | Function, t: float = 0.0) -> None:
        """Write a functions to file with a given time."""
        cpp_objects = [u._cpp_object] if isinstance(u, Function) else [_u._cpp_object for _u in u]
        super().write(cpp_objects, t)


class XDMFFile(_cpp.io.XDMFFile):