Just a function that reads a line of a text file, strips out [ ] and converts to list of floats

text_2_floatlist.py

def text_to_floatlist(pathfile):
        f = open(pathfile, 'r')
        line = f.readline().strip('[]')
        f.close()
        return [float(x) for x in line.split()]

#Use
        rect = text_to_floatlist(seg_bb[frame_count])
        if(len(rect) < 4):
            logger.critical("Length of rectangle not long enough %d",int(len(rect)) )
            return -1
        ul = (int(rect[0]), int(rect[1]))
        br = (int(rect[2]),int(rect[3]))