i trying to get speed,course from gpx track
my trackPoint

<trkpt lon="77.209995" lat="28.520444"><ele>236.502853</ele><time>2022-02-20T02:04:51Z</time><extensions><speed>0.788036</speed><course>209.456757</course><hAcc>6.222376</hAcc><vAcc>1.408607</vAcc></extensions></trkpt>

with open('kaggle/input/workout-routes/route_2022-02-02_8.06pm.gpx', 'r') as gpx_file:
    gpx = gpxpy.parse(gpx_file)
route_info = []

for track in gpx.tracks:
    for segment in track.segments:
        for ind, point in enumerate(segment.points):
            print(point.speed)
            route_info.append({
                'latitude': point.latitude,
                'longitude': point.longitude,
                'elevation': point.elevation,
                'time': np.datetime64(point.time),
                'course': point.course
            })

point.speed = None

i trying to get speed with extensions like this

point.extensions

and get [<Element ‘speed’ at 0x000001ADBB50A7A0>]

how i can get speed and at it in route_info