where(self, cond, other=None) -> 'Index'

The replacement is taken from other.

Parameters

cond : bool array-like with the same length as self

Condition to select the values on.

other : scalar, or array-like, default None

Replacement if the condition is False.

Returns

pandas.Index

A copy of self with values replaced from other where the condition is False.

Replace values where the condition is False.

See Also

DataFrame.where

Same method for DataFrame.

Series.where

Same method for Series.

Examples

This example is valid syntax, but we were not able to check execution

>>> idx = pd.Index(['car', 'bike', 'train', 'tractor'])
... idx
Index(['car', 'bike', 'train', 'tractor'], dtype='object')

This example is valid syntax, but we were not able to check execution

>>> idx.where(idx.isin(['car', 'train']), 'other')
Index(['car', 'other', 'train', 'other'], dtype='object')

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

pandas.core.indexes.base.Index.asof_locs

Local connectivity graph

Hover to see nodes names; edges to Self not shown, Caped at 50 nodes.

Using a canvas is more power efficient and can get hundred of nodes ; but does not allow hyperlinks; , arrows or text (beyond on hover)

SVG is more flexible but power hungry; and does not scale well to 50 + nodes.

All aboves nodes referred to, (or are referred from) current nodes; Edges from Self to other have been omitted (or all nodes would be connected to the central node "self" which is not useful). Nodes are colored by the library they belong to, and scaled with the number of references pointing them

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File: /pandas/core/indexes/base.py#4872
type: <class 'function'>
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