epygram.formats.netCDF
— Interface-Class to the netCDF format¶
Contains classes for netCDF4 resource.
-
class
epygram.formats.netCDF.
netCDF
(*args, **kwargs)[source]¶ Bases:
epygram.resources.FileResource.FileResource
Class implementing all specificities for netCDF (4) resource format.
Note
This class is managed by footprint.
- info: Not documented
- priority: PriorityLevel::DEFAULT (rank=1)
Automatic parameters from the footprint:
- behaviour (
footprints.stdtypes.FPDict
) - rxx - Describes how fields are defined in resource.- Optional. Default is dict(H1D_is_H2D_unstructured = True, flatten_horizontal_grids = False, reverse_Yaxis = False, write_lonlat_grid = True,).
- filename (
str
) - rxx - File name (absolute or relative) of the resource. - fmtdelayedopen (
bool
) - rxx - Opening of the resource delayed (not at time of construction).- Optional. Default is False.
- format (
str
) - rxx - Format of the resource.- Optional. Default is ‘netCDF’.
- Values: set([‘netCDF’])
- openmode (
str
) - rxx - Opening mode.- Values: set([‘a’, ‘write’, ‘r’, ‘w’, ‘read’, ‘append’])
- Remap: dict(append = ‘a’, read = ‘r’, write = ‘w’,)
-
behave
(**kwargs)[source]¶ Set-up the given arguments in self.behaviour, for the purpose of building fields from netCDF.
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find_fields_in_resource
(seed=None, generic=False, **_)[source]¶ Returns a list of the fields from resource whose name match the given seed.
Parameters: - seed – might be a regular expression, a list of regular expressions or None. If None (default), returns the list of all fields in resource.
- fieldtype – optional, among (‘H2D’, ‘Misc’) or a list of these strings. If provided, filters out the fields not of the given types.
- generic – if True, returns complete fid’s, union of {‘FORMATname’:fieldname} and the according generic fid of the fields.
-
ncinfo_field
(*args, **kwargs)¶ Get info about the field (dimensions and meta-data of the netCDF variable).
Parameters: fid – netCDF field identifier
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open
(openmode=None)[source]¶ Opens a netCDF and initializes some attributes.
Parameters: openmode – optional, to open with a specific openmode, eventually different from the one specified at initialization.
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readfield
(*args, **kwargs)¶ Reads one field, given its netCDF name, and returns a Field instance.
Parameters: - fid – netCDF field identifier
- getdata – if False, only metadata are read, the field do not contain data.
- only – to specify indexes [0 ... n-1] of specific dimensions, e.g. {‘time’:5,} to select only the 6th term of time dimension.
- adhoc_behaviour – to specify “on the fly” a behaviour (usual dimensions or grids, ...).
-
set_default_global_attributes
()[source]¶ Set default global attributes (those from config.netCDF_default_global_attributes).
-
what
(out=<open file '<stdout>', mode 'w'>, **_)[source]¶ Writes in file a summary of the contents of the GRIB.
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writefield
(field, compression=4, metadata=None, adhoc_behaviour=None)[source]¶ Write a field in resource.
Parameters: field – the Field
object to write- :param compression ranges from 1 (low compression, fast writing)
- to 9 (high compression, slow writing). 0 is no compression.
Parameters: - metadata – dict, can be filled by any meta-data, that will be stored as attribute of the netCDF variable.
- adhoc_behaviour – to specify “on the fly” a behaviour (usual dimensions or grids, ...).