result.txt

这个代码可以生成跟踪之后result.txt吗，如果没有该怎么修改

在whie 循环前
rf = open("result.txt","a")
循环体里， result 生成后
将 result 写入 rf

在whie 循环结束后

rf.close()

from objdetector import Detector
import imutils
import cv2

VIDEO_PATH = './video/test_person.mp4'
RESULT_PATH = 'result.mp4'

def main():

func_status = {}
func_status['headpose'] = None

name = 'demo'

det = Detector()
cap = cv2.VideoCapture(VIDEO_PATH)
fps = int(cap.get(5))
print('fps:', fps)
t = int(1000/fps)

size = None
videoWriter = None

while True:

    # try:
    _, im = cap.read()
    if im is None:
        break
    
    result = det.feedCap(im, func_status)
    result = result['frame']
    result = imutils.resize(result, height=500)
    if videoWriter is None:
        fourcc = cv2.VideoWriter_fourcc(
            'm', 'p', '4', 'v')  # opencv3.0
        videoWriter = cv2.VideoWriter(
            RESULT_PATH, fourcc, fps, (result.shape[1], result.shape[0]))

    videoWriter.write(result)
    cv2.imshow(name, result)
    cv2.waitKey(t)

    if cv2.getWindowProperty(name, cv2.WND_PROP_AUTOSIZE) < 1:
        # 点x退出
        break

cap.release()
videoWriter.release()
cv2.destroyAllWindows()

if name == 'main':

main()

请问该如何在这个代码添加语句，生存多目标跟踪之后的result.txt文件