# cfdm.core.DomainAxis¶

class cfdm.core.DomainAxis(size=None, source=None, copy=True)[source]

Bases: cfdm.core.abstract.container.Container

A domain axis construct of the CF data model.

A domain axis construct specifies the number of points along an independent axis of the domain. It comprises a positive integer representing the size of the axis. In CF-netCDF it is usually defined either by a netCDF dimension or by a scalar coordinate variable, which implies a domain axis of size one. The field construct’s data array spans the domain axis constructs of the domain, with the optional exception of size one axes, because their presence makes no difference to the order of the elements.

New in version (cfdm): 1.7.0

Initialisation

Parameters
size: int, optional

The size of the domain axis.

Parameter example:

size=192

The size may also be set after initialisation with the set_size method.

source: optional

Convert source, which can be any type of object, to a DomainAxis instance.

All other parameters, apart from copy, are ignored and their values are instead inferred from source by assuming that it has the DomainAxis API. Any parameters that can not be retrieved from source in this way are assumed to have their default value.

Note that if x is also a DomainAxis instance then cfdm.core.DomainAxis(source=x) is equivalent to x.copy().

copy: bool, optional

If True (the default) then deep copy the input parameters prior to initialisation. By default the parameters are not deep copied.

## Inspection¶

Attributes

 construct_type Return a description of the construct type.

## Size¶

Methods

 del_size Remove the size. get_size Return the size. has_size Whether the size has been set. set_size Set the size.

Attributes

 construct_type Return a description of the construct type.

## Miscellaneous¶

Methods

 copy Return a deep copy.

## Special¶

Methods

 __deepcopy__ Called by the copy.deepcopy function.

## Docstring substitutions¶

Methods

 _docstring_special_substitutions Return the special docstring substitutions. _docstring_substitutions Returns the substitutions that apply to methods of the class. _docstring_package_depth Returns the class {{package}} substitutions package depth. _docstring_method_exclusions Returns method names excluded in the class substitutions.