# xarray.CFTimeIndex.to_flat_index

#### CFTimeIndex.to_flat_index()[[source]](https://github.com/pydata/xarray/blob/main/xarray/../.pixi/envs/doc/lib/python3.14/site-packages/pandas/core/indexes/base.py#L1630-L1646)

Identity method.

This is implemented for compatibility with subclass implementations
when chaining.

* **Returns:**
  [`Index`](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Index.html#pandas.Index) – Caller.

#### SEE ALSO
`MultiIndex.to_flat_index`
: Subclass implementation.