How to use the fastkml.styles function in fastkml

highlight
              #highlightState
            
          
          
        """
        k = kml.KML()
        k.from_string(doc)
        self.assertEqual(len(list(k.features())), 1)
        self.assertTrue(
            isinstance(list(list(k.features())[0].styles())[0], styles.StyleMap)
        )
        sm = list(list(list(k.features())[0].styles()))[0]
        self.assertTrue(isinstance(sm.normal, styles.StyleUrl))
        self.assertEqual(sm.normal.url, '#normalState')
        self.assertTrue(isinstance(sm.highlight, styles.StyleUrl))
        self.assertEqual(sm.highlight.url, '#highlightState')
        k2 = kml.KML()
        k2.from_string(k.to_string())
        self.assertEqual(k.to_string(), k2.to_string())

normal
              #normalState
            
            
              highlight
              #highlightState
            
          
          
        """
        k = kml.KML()
        k.from_string(doc)
        self.assertEqual(len(list(k.features())), 1)
        self.assertTrue(
            isinstance(list(list(k.features())[0].styles())[0], styles.StyleMap)
        )
        sm = list(list(list(k.features())[0].styles()))[0]
        self.assertTrue(isinstance(sm.normal, styles.StyleUrl))
        self.assertEqual(sm.normal.url, '#normalState')
        self.assertTrue(isinstance(sm.highlight, styles.StyleUrl))
        self.assertEqual(sm.highlight.url, '#highlightState')
        k2 = kml.KML()
        k2.from_string(k.to_string())
        self.assertEqual(k.to_string(), k2.to_string())

# Flight path array is in lat,lon,alt order, needs to be in lon,lat,alt
        track_points.append([_point[2],_point[1],_point[3]])

    _flight_geom = LineString(track_points)

    # Define the Line and Polygon styles, which are used for the flight path, and the extrusions (if enabled)
    flight_track_line_style = fastkml.styles.LineStyle(
        ns=ns,
        color=track_color,
        width=track_width)

    flight_extrusion_style = fastkml.styles.PolyStyle(
        ns=ns,
        color=poly_color)

    flight_track_style = fastkml.styles.Style(
        ns=ns,
        styles=[flight_track_line_style, flight_extrusion_style])

    # Generate the Placemark which will contain the track data.
    flight_line = fastkml.kml.Placemark(
        ns=ns,
        id=placemark_id,
        name=name,
        styles=[flight_track_style])

    # Add the track data to the Placemark
    flight_line.geometry = fastkml.geometry.Geometry(
        ns=ns,
        geometry=_flight_geom,
        altitude_mode=_alt_mode,
        extrude=extrude,

def new_placemark(lat, lon, alt,
    placemark_id="Placemark ID",
    name="Placemark Name",
    absolute = False,
    icon = "http://maps.google.com/mapfiles/kml/shapes/placemark_circle.png",
    scale = 1.0):
    """ Generate a generic placemark object """

    if absolute:
        _alt_mode = 'absolute'
    else:
        _alt_mode = 'clampToGround'

    flight_icon_style = fastkml.styles.IconStyle(
        ns=ns, 
        icon_href=icon, 
        scale=scale)

    flight_style = fastkml.styles.Style(
        ns=ns,
        styles=[flight_icon_style])

    flight_placemark = fastkml.kml.Placemark(
        ns=ns, 
        id=placemark_id,
        name=name,
        description="",
        styles=[flight_style])

    flight_placemark.geometry = fastkml.geometry.Geometry(