Pandas.name — Pandas 1.5.0 Documentation

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pandas.Index.rename# Index.rename(name, *, inplace=False)[source]#

Alter Index or MultiIndex name.

Able to set new names without level. Defaults to returning new index. Length of names must match number of levels in MultiIndex.

Parameters: namelabel or list of labels

Name(s) to set.

inplacebool, default False

Modifies the object directly, instead of creating a new Index or MultiIndex.

Returns: Index or None

The same type as the caller or None if inplace=True.

See also

Index.set_names

Able to set new names partially and by level.

Examples

>>> idx = pd.Index(['A', 'C', 'A', 'B'], name='score') >>> idx.rename('grade') Index(['A', 'C', 'A', 'B'], dtype='object', name='grade') >>> idx = pd.MultiIndex.from_product([['python', 'cobra'], ... [2018, 2019]], ... names=['kind', 'year']) >>> idx MultiIndex([('python', 2018), ('python', 2019), ( 'cobra', 2018), ( 'cobra', 2019)], names=['kind', 'year']) >>> idx.rename(['species', 'year']) MultiIndex([('python', 2018), ('python', 2019), ( 'cobra', 2018), ( 'cobra', 2019)], names=['species', 'year']) >>> idx.rename('species') Traceback (most recent call last): TypeError: Must pass list-like as `names`. On this page
  • Index.rename()
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