QuantityInfo#

class astropy.units.quantity.QuantityInfo(bound=False)[source]#

Bases: QuantityInfoBase

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.

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 Quantity instance which is consistent with the input cols and has length rows.

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 Quantity this is just the quantity itself.

Returns:
arrayslist of ndarray
new_like(cols, length, metadata_conflicts='warn', name=None)[source]#

Return a new Quantity 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:
colQuantity (or subclass)

Empty instance of this class consistent with cols