# xarray.CFTimeIndex.has_duplicates
#### *property* CFTimeIndex.has_duplicates
Check if the Index has duplicate values.
This is the inverse of `is_unique`. It returns `True`
if any value appears more than once in the index, `False` otherwise.
* **Returns:**
[`bool`](https://docs.python.org/3/builtins/functions.html#bool) – Whether or not the Index has duplicate values.
#### SEE ALSO
`Index.is_unique`
: Inverse method that checks if it has unique values.
### Examples
```pycon
>>> idx = pd.Index([1, 5, 7, 7])
>>> idx.has_duplicates
True
```
```pycon
>>> idx = pd.Index([1, 5, 7])
>>> idx.has_duplicates
False
```
```pycon
>>> idx = pd.Index(["Watermelon", "Orange", "Apple", "Watermelon"]).astype(
... "category"
... )
>>> idx.has_duplicates
True
```
```pycon
>>> idx = pd.Index(["Orange", "Apple", "Watermelon"]).astype("category")
>>> idx.has_duplicates
False
```