# Having trouble importing the lazy_laurent_series module

I am trying to import and use lazy Laurent series rings in sage, documented here: (http://doc.sagemath.org/html/en/refer...). I have the latest version of sage installed, and yet when I attempt to import/install the package it is nowhere to be found.

```
from sage.rings.lazy_laurent_series_ring import LazyLaurentSeriesRing
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-1-db0f55e1138b> in <module>()
----> 1 from sage.rings.lazy_laurent_series_ring import LazyLaurentSeriesRing
ImportError: No module named lazy_laurent_series_ring
```

I then tried to download it, perhaps I am not downloading the correct package? Where is it hiding?

```
sage -i lazy_laurent_series
Error: package 'lazy_laurent_series' not found
Note: if it is an old-style package, use -p instead of -i to install it
```