improver.utilities.save module

Module for saving netcdf cubes with desired attribute types.

improver.utilities.save._append_metadata_cube(cubelist, global_keys)[source]
Create a metadata cube associated with statistical

post-processing attributes of the input cube list.

Parameters

  • cubelist (iris.cube.CubeList) – List of cubes to be saved

  • global_keys (list) – List of attributes to be treated as global across cubes and within any netCDF files produced using these cubes.

Returns

iris.cube.CubeList with appended metadata cube

improver.utilities.save._check_metadata(cube)[source]

Checks cube metadata that needs to be correct to guarantee data integrity

Parameters

cube (iris.cube.Cube) – Cube to be checked

Raises

  • ValueError – if time coordinates do not have the required datatypes and units; needed because values may be wrong

  • ValueError – if numerical datatypes are other than 32-bit (except where specified); needed because values may be wrong

  • ValueError – if cube dataset has unknown units; because this may cause misinterpretation on “load”

improver.utilities.save._order_cell_methods(cube)[source]

Sorts the cell methods on a cube such that if there are multiple methods they are always written in a consistent order in the output cube. The input cube is modified.

Parameters

cube (iris.cube.Cube) – The cube on which the cell methods are to be sorted.

improver.utilities.save.save_netcdf(cubelist, filename)[source]

Save the input Cube or CubeList as a NetCDF file and check metadata where required for integrity.

Uses the functionality provided by iris.fileformats.netcdf.save with local_keys to record non-global attributes as data attributes rather than global attributes.

Parameters
Raises

warning if cubelist contains cubes of varying dimensions. –