iam working with opencv python for video analytics, i have this code for counting the vehicles…..but i need only for moving vehicles not for parked vehicles….

please review my code and reply me as soon as possible

 def isPark(self,track, rois, speedThres, dt,maxlen):
    x,y,w,h = track.attr['xywh']
    key = 'getVelocity'
    if key not in track.dict:
        track.dict[key] = deque(maxlen=maxlen)
    track.dict[key].append((x,y))
    if 'park' not in track.dict:
        track.dict['park'] = 0
        track.dict['park_roi'] = 0

    if len(track.dict[key]) == maxlen:
        x0,y0 = track.dict[key][0]
        x1,y1 = track.dict[key][-1]
        dx = x1 - x0
        dy = y1 - y0
        speed = (dx**2 + dy**2)**.5/w
        if speed is not None:
            speed_new = int(speed * 15)
            if speed_new < speedThres:
                track.dict['park'] += dt
                if point_in_poly(x,y, rois):
                    track.dict['park_roi'] += dt
            else:
                track.dict['park'] -= dt
                track.dict['park_roi'] -= dt
                track.dict['park'] = max(0, track.dict['park'])
                track.dict['park_roi'] = max(0, track.dict['park_roi'])

i need like this for reference