# xarray.CFTimeIndex.is_

#### CFTimeIndex.is_(other)[[source]](https://github.com/pydata/xarray/blob/main/xarray/../.pixi/envs/doc/lib/python3.15/site-packages/pandas/core/indexes/base.py#L802-L840)

More flexible, faster check like `is` but that works through views.

Note: this is *not* the same as `Index.identical()`, which checks
that metadata is also the same.

* **Parameters:**
  **other** ([`Index`](https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Index.html#pandas.Index)) – Other Index to compare against.
* **Returns:**
  [`bool`](https://docs.python.org/3/builtins/functions.html#bool) – True if both have same underlying data, False otherwise.

#### SEE ALSO
`Index.identical`
: Works like `Index.is_` but also checks metadata.

### Examples

<div class="try_examples_button_container"><button class="try_examples_button" onclick="window.tryExamplesShowIframe('8d2f2d6a-0c1d-480c-869e-b02e5684dfe5','f4778100-2179-4ac9-92ff-9cff5190ea9b','389aec04-a67b-4cb0-a53b-df282d48b7f4','../lite/tree/../notebooks/index.html?path=9677712a_4854_4768_bc03_79490b4439f0.ipynb','None')">Try it in your browser!</button></div>
```pycon
>>> idx1 = pd.Index(["1", "2", "3"])
>>> idx1.is_(idx1.view())
True
```

```pycon
>>> idx1.is_(idx1.copy())
False
```

<div id="389aec04-a67b-4cb0-a53b-df282d48b7f4" class="try_examples_outer_iframe  hidden"><div class="try_examples_button_container"><button class="try_examples_button" onclick="window.tryExamplesHideIframe('8d2f2d6a-0c1d-480c-869e-b02e5684dfe5','389aec04-a67b-4cb0-a53b-df282d48b7f4')">Go Back</button><button class="try_examples_button" onclick="window.openInNewTab('8d2f2d6a-0c1d-480c-869e-b02e5684dfe5','389aec04-a67b-4cb0-a53b-df282d48b7f4')">Open In Tab</button></div><div id="f4778100-2179-4ac9-92ff-9cff5190ea9b" class="jupyterlite_sphinx_iframe_container"></div></div><script>document.addEventListener("DOMContentLoaded", function() {window.loadTryExamplesConfig("../try_examples.json");});</script>