QuantityInfo

class astropy.units.QuantityInfo(bound=False)

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()

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:

arrayspython:list of ndarray

new_like(cols, length, metadata_conflicts='warn', name=None)

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:

colspython:list

List of input columns

lengthpython:int

Length of the output column object

metadata_conflictspython:str (‘warn’|’error’|’silent’)

How to handle metadata conflicts

namepython:str

Output column name

Returns:

colQuantity (or subclass)

Empty instance of this class consistent with cols