ColumnInfo#

class astropy.table.ColumnInfo(bound=False)[source]#

Container for meta information like name, description, format.

This is required when the object is used as a mixin column within a table, but can be used as a general way to store meta information.

Attributes Summary

Methods Summary

`get_sortable_arrays`()	Return a list of arrays which can be lexically sorted to represent the order of the parent column.
`new_like`(cols, length[, metadata_conflicts, ...])	Return a new Column instance which is consistent with the input `cols` and has `length` rows.

Attributes Documentation

attr_names = {'description', 'dtype', 'format', 'groups', 'indices', 'meta', 'name', 'parent_table', 'unit'}#

attrs_from_parent = {'description', 'dtype', 'format', 'groups', 'indices', 'meta', 'name', 'parent_table', 'unit'}#

Methods Documentation

get_sortable_arrays()[source]#

Return a list of arrays which can be lexically sorted to represent the order of the parent column.

For Column this is just the column itself.

Returns:

new_like(cols, length, metadata_conflicts='warn', name=None)[source]#

Return a new Column instance which is consistent with the input cols and has length rows.

This is intended for creating an empty column object whose elements can be set in-place for table operations like join or vstack.

Parameters:

colslist: List of input columns
lengthint: Length of the output column object
metadata_conflictsstr (‘warn’|’error’|’silent’): How to handle metadata conflicts
namestr: Output column name

Returns:

colColumn (or subclass): New instance of this class consistent with cols