TimeInfoBase#

class astropy.time.TimeInfoBase(bound=False)[source]#

Bases: MixinInfo

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.

This base class is common between TimeInfo and TimeDeltaInfo.

Attributes Summary

`attr_names`
`attrs_from_parent`
`description`
`dtype`
`format`
`groups`
`indices`
`mask_val`
`meta`
`name`
`parent_table`
`serialize_method`
`unit`

Methods Summary

`__call__`([option, out])	Write summary information about data object to the `out` filehandle.
`adjust_indices`(index, value, col_len)	Adjust info indices after column modification.
`get_sortable_arrays`()	Return a list of arrays which can be lexically sorted to represent the order of the parent column.
`info_summary_attributes`(dat)
`info_summary_stats`(dat)
`iter_str_vals`()	This is a mixin-safe version of Column.iter_str_vals.
`merge_cols_attributes`(cols, ...)	Utility method to merge and validate the attributes `attrs` for the input table columns `cols`.
`new_like`(cols, length[, metadata_conflicts, ...])	Return a new Time instance which is consistent with the input Time objects `cols` and has `length` rows.
`slice_indices`(col_slice, item, col_len)	Given a sliced object, modify its indices to correctly represent the slice.

Attributes Documentation

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

attrs_from_parent = {}#

description#

dtype#

format#

groups#

indices#

mask_val = masked#

meta#

name#

parent_table#

serialize_method#

unit#

Methods Documentation

__call__(option='attributes', out='')#

Write summary information about data object to the out filehandle. By default this prints to standard output via sys.stdout.

The option argument specifies what type of information to include. This can be a string, a function, or a list of strings or functions. Built-in options are:

attributes: data object attributes like dtype and format
stats: basic statistics: min, mean, and max

If a function is specified then that function will be called with the data object as its single argument. The function must return an OrderedDict containing the information attributes.

If a list is provided then the information attributes will be appended for each of the options, in order.

Parameters:

optionpython:str, python:callable(), python:list of (python:str or python:callable()): Info option, defaults to ‘attributes’.
outpython:file-like object, python:None: Output destination, defaults to sys.stdout. If None then the OrderedDict with information attributes is returned

Returns:

infoOrderedDict or python:None: OrderedDict if out==None else None

Examples

>>> from astropy.table import Column
>>> c = Column([1, 2], unit='m', dtype='int32')
>>> c.info()
dtype = int32
unit = m
class = Column
n_bad = 0
length = 2

>>> c.info(['attributes', 'stats'])
dtype = int32
unit = m
class = Column
mean = 1.5
std = 0.5
min = 1
max = 2
n_bad = 0
length = 2

adjust_indices(index, value, col_len)#

Adjust info indices after column modification.

Parameters:

indexslice, python:int, python:list, or ndarray: Element(s) of column to modify. This parameter can be a single row number, a list of row numbers, an ndarray of row numbers, a boolean ndarray (a mask), or a column slice.
valuepython:int, python:list, or ndarray: New value(s) to insert
col_lenpython:int: Length of the column

get_sortable_arrays()[source]#

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

Returns:

arrayspython:list of ndarray

static info_summary_attributes(dat)#

static info_summary_stats(dat)#

iter_str_vals()#: This is a mixin-safe version of Column.iter_str_vals.

static merge_cols_attributes(cols, metadata_conflicts, name, attrs)#

Utility method to merge and validate the attributes attrs for the input table columns cols.

Note that dtype and shape attributes are handled specially. These should not be passed in attrs but will always be in the returned dict of merged attributes.

Parameters:

colspython:list: List of input Table column objects
metadata_conflictspython:str (‘warn’|’error’|’silent’): How to handle metadata conflicts
namepython:str: Output column name
attrspython:list: List of attribute names to be merged

Returns:

attrspython:dict: Of merged attributes.

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

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

This is intended for creating an empty Time instance whose elements can be set in-place for table operations like join or vstack. It checks that the input locations and attributes are consistent. This is used when a Time object is used as a mixin column in an astropy Table.

Parameters:

colspython:list: List of input columns (Time objects)
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:

colTime (or subclass): Empty instance of this class consistent with cols

slice_indices(col_slice, item, col_len)#

Given a sliced object, modify its indices to correctly represent the slice.

Parameters:

col_sliceColumn or mixin: Sliced object. If not a column, it must be a valid mixin, see https://docs.astropy.org/en/stable/table/mixin_columns.html
itemslice, python:list, or ndarray: Slice used to create col_slice
col_lenpython:int: Length of original object