TimeInfo

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

Bases: astropy.utils.data_info.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.

Attributes Summary

attr_names

attrs_from_parent

mask_val

unit

Methods Summary

__call__(self[, option, out])

Write summary information about data object to the out filehandle.

adjust_indices(self, index, value, col_len)

Adjust info indices after column modification.

info_summary_attributes(dat)

info_summary_stats(dat)

iter_str_vals(self)

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(self, cols, length[, …])

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

slice_indices(self, 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 = {'unit'}
mask_val = masked
unit

Methods Documentation

__call__(self, 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
optionstr, function, list of (str or function)

Info option, defaults to ‘attributes’.

outfile-like object, None

Output destination, defaults to sys.stdout. If None then the OrderedDict with information attributes is returned

Returns
infoOrderedDict 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(self, index, value, col_len)

Adjust info indices after column modification.

Parameters
indexslice, int, 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.

valueint, list, or ndarray

New value(s) to insert

col_lenint

Length of the column

static info_summary_attributes(dat)
static info_summary_stats(dat)
iter_str_vals(self)

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
colslist

List of input Table column objects

metadata_conflictsstr (‘warn’|’error’|’silent’)

How to handle metadata conflicts

namestr

Output column name

attrslist

List of attribute names to be merged

Returns
attrsdict of merged attributes
new_like(self, 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
colslist

List of input columns (Time objects)

lengthint

Length of the output column object

metadata_conflictsstr (‘warn’|’error’|’silent’)

How to handle metadata conflicts

namestr

Output column name

Returns
colTime (or subclass)

Empty instance of this class consistent with cols

slice_indices(self, col_slice, item, col_len)

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

Parameters
col_sliceColumn or mixin

Sliced object

itemslice, list, or ndarray

Slice used to create col_slice

col_lenint

Length of original object