library not working

[Anugaradhawa]

I run this below code. it does not detect objects. detecting window also not working. please anyone help me

import cv2
import matplotlib.pyplot as plt
import cvlib as cv
import urllib.request
import numpy as np
from cvlib.object_detection import draw_bbox
import concurrent.futures

url='http://192.169.1.4/cam-hi.jpg'
im=None

def run1():
cv2.namedWindow("detection", cv2.WINDOW_AUTOSIZE)
while True:
img_resp=urllib.request.urlopen(url)
imgnp=np.array(bytearray(img_resp.read()),dtype=np.uint8)
im = cv2.imdecode(imgnp,-1)

    bbox, label, conf = cv.detect_common_objects(im, confidence=0.6, model="yolov3-tiny")

    print(bbox, label, conf)

    im = draw_bbox(im, bbox, label, conf)

    cv2.imshow("live transmission",im)
    key=cv2.waitKey(5)
    if key==ord('q'):
        break

cv2.destroyAllWindows()

if name == 'main':
print("started")
with concurrent.futures.ProcessPoolExecutor() as executer:
f1= executer.submit(run1)