I am new to geopandas and would like to plot only the outline of a polygon, similar to the function `ST_Boundary()` in PostGIS

I have a geodataframe `states` containing polygons for each state

```
states = counties.dissolve(by='STATEFP')

```

When I subset by one state, I am able to plot that state:

```
states.loc[states.index.isin(['06'])]['geometry']

```

I am only interested in the outline but it is not clear in the documentation how to convert a polygon to line geometry however. Is there a useful method in `geopandas` or another spatial library that might help in converting a polygon to a linestring?

[![enter image description here](https://i.stack.imgur.com/jUv5Zm.png)](https://i.stack.imgur.com/jUv5Zm.png)