larray.LGroup

class larray.LGroup(key, name=None, axis=None)

Label group.

Represents a subset of labels of an axis.

Parameters:

key : key

Anything usable for indexing. A key should be either sequence of labels, a slice with label bounds or a string.

name : str, optional

Name of the group.

axis : int, str, Axis, optional

Axis for group.

Examples

>>> from larray import Axis, X
>>> age = Axis('0..100', 'age')
>>> teens = X.age[10:19].named('teens')
>>> teens
X.age[10:19] >> 'teens'
>>> teens = X.age[10:19] >> 'teens'
>>> teens
X.age[10:19] >> 'teens'

__init__(key, name=None, axis=None)

Methods

__init__(key[, name, axis])
by(length[, step])	Split group into several groups of specified length.
containing(substring)	Returns a group with all the labels containing the specified substring.
difference(other)	Returns (set) difference of this label group and other.
endingwith(suffix)	Returns a group with the labels ending with the specified string.
eval()
intersection(other)	Returns (set) intersection of this label group and other.
matching(pattern)	Returns a group with all the labels matching the specified pattern (regular expression).
named(name)	Returns group with a different name.
retarget_to(target_axis)	Retarget group to another axis.
set()	Creates LSet from this group
startingwith(prefix)	Returns a group with the labels starting with the specified string.
to_label()
translate([bound, stop])	compute position(s) of group
union(other)	Returns (set) union of this label group and other.
with_axis(axis)	Returns group with a different axis.