Group

class astropy.io.votable.tree.Group(table, ID=None, name=None, ref=None, ucd=None, utype=None, id=None, config=None, pos=None, **extra)

Bases: astropy.io.votable.tree.Element, astropy.io.votable.tree._IDProperty, astropy.io.votable.tree._NameProperty, astropy.io.votable.tree._UtypeProperty, astropy.io.votable.tree._UcdProperty, astropy.io.votable.tree._DescriptionProperty

GROUP element: groups FIELD and PARAM elements.

This information is currently ignored by the vo package—that is the columns in the recarray are always flat—but the grouping information is stored so that it can be written out again to the XML file.

The keyword arguments correspond to setting members of the same name, documented below.

Attributes Summary

entries	[read-only] A list of members of the GROUP. This list may
ref	Currently ignored, as it’s not clear from the spec how this is meant to work.

Methods Summary

iter_fields_and_params()	Recursively iterate over all Param elements in this Group.
iter_groups()	Recursively iterate over all sub-Group instances in this Group.
parse(iterator, config)	For internal use.
to_xml(w, **kwargs)	For internal use.

Attributes Documentation

entries

[read-only] A list of members of the GROUP. This list may only contain objects of type Param, Group, ParamRef and FieldRef.

ref

Currently ignored, as it’s not clear from the spec how this is meant to work.

Methods Documentation

iter_fields_and_params()

Recursively iterate over all Param elements in this Group.

iter_groups()

Recursively iterate over all sub-Group instances in this Group.

parse(iterator, config)

For internal use. Parse the XML content of the children of the element.

Parameters:

iterator : xml iterator

An iterator over XML elements as returned by get_xml_iterator.

config : dict

The configuration dictionary that affects how certain elements are read.

Returns:

self : Element

Returns self as a convenience.

to_xml(w, **kwargs)

For internal use. Output the element to XML.

Parameters:

w : astropy.utils.xml.writer.XMLWriter object

An XML writer to write to.

kwargs : dict

Any configuration parameters to control the output.