function.py 文件源码

def _indices(cls, **kwargs):
        """Return the default dimension indices for a given data shape

        :param grid: :class:`Grid` that defines the spatial domain.
        :param dimensions: Optional, list of :class:`Dimension`
                           objects that defines data layout.
        :return: Dimension indices used for each axis.

        ..note::

        Only one of :param grid: or :param dimensions: is required.
        """
        grid = kwargs.get('grid', None)
        dimensions = kwargs.get('dimensions', None)
        if grid is None:
            if dimensions is None:
                error("Creating a Function object requries either "
                      "a 'grid' or the 'dimensions' argument.")
                raise ValueError("Unknown symbol dimensions or shape")
        else:
            if dimensions is not None:
                warning("Creating Function with 'grid' and 'dimensions' "
                        "argument; ignoring the 'dimensions' and using 'grid'.")
            dimensions = grid.dimensions
        return dimensions