# pandas.IntervalIndex¶

class pandas.IntervalIndex[source]

Immutable index of intervals that are closed on the same side.

New in version 0.20.0.

Parameters
dataarray-like (1-dimensional)

Array-like containing Interval objects from which to build the IntervalIndex.

closed{‘left’, ‘right’, ‘both’, ‘neither’}, default ‘right’

Whether the intervals are closed on the left-side, right-side, both or neither.

dtypedtype or None, default None

If None, dtype will be inferred.

New in version 0.23.0.

copybool, default False

Copy the input data.

nameobject, optional

Name to be stored in the index.

verify_integritybool, default True

Verify that the IntervalIndex is valid.

Index

The base pandas Index type.

Interval

A bounded slice-like interval; the elements of an IntervalIndex.

interval_range

Function to create a fixed frequency IntervalIndex.

cut

Bin values into discrete Intervals.

qcut

Bin values into equal-sized Intervals based on rank or sample quantiles.

Notes

See the user guide for more.

Examples

A new IntervalIndex is typically constructed using interval_range():

>>> pd.interval_range(start=0, end=5)
IntervalIndex([(0, 1], (1, 2], (2, 3], (3, 4], (4, 5]],
closed='right',
dtype='interval[int64]')


It may also be constructed using one of the constructor methods: IntervalIndex.from_arrays(), IntervalIndex.from_breaks(), and IntervalIndex.from_tuples().

See further examples in the doc strings of interval_range and the mentioned constructor methods.

Attributes

 left Return the left endpoints of each Interval in the IntervalArray as an Index. right Return the right endpoints of each Interval in the IntervalArray as an Index. closed Whether the intervals are closed on the left-side, right-side, both or neither. mid Return the midpoint of each Interval in the IntervalArray as an Index. length Return an Index with entries denoting the length of each Interval in the IntervalArray. is_empty Indicates if an interval is empty, meaning it contains no points. is_non_overlapping_monotonic Return True if the IntervalArray is non-overlapping (no Intervals share points) and is either monotonic increasing or monotonic decreasing, else False. is_overlapping Return True if the IntervalIndex has overlapping intervals, else False. values Return the IntervalIndex’s data as an IntervalArray.

Methods

 from_arrays(left, right, closed[, name, dtype]) Construct from two arrays defining the left and right bounds. from_tuples(data, closed[, name, dtype]) Construct an IntervalIndex from an array-like of tuples. from_breaks(breaks, closed[, name, dtype]) Construct an IntervalIndex from an array of splits. contains(self, \*args, \*\*kwargs) Check elementwise if the Intervals contain the value. overlaps(self, \*args, \*\*kwargs) Check elementwise if an Interval overlaps the values in the IntervalArray. set_closed(self, \*args, \*\*kwargs) Return an IntervalArray identical to the current one, but closed on the specified side. to_tuples(self, \*args, \*\*kwargs) Return an ndarray of tuples of the form (left, right).