ColumnInfo

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

Bases: BaseColumnInfo

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

attr_names

attrs_from_parent

description

dtype

format

groups

indices

meta

name

parent_table

unit

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'}
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:
arrayslist of ndarray
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