'module' has no 'readNet'

hi,

i’m trying to use yolo but when i use the command $ python yolo_opencv.py --image dog.jpg --config yolov3.cfg --weights yolov3.weights --classes yolov3.txt

i get the following error

Traceback (most recent call last):
  File "yolo_opencv.py", line 57, in <module>
    net = cv2.dnn.readNet(args.weights, args.config)
AttributeError: 'module' object has no attribute 'readNet'

i’m using python 2.7.12

if I use python 3 $ python3 yolo_opencv.py --image dog.jpg --config yolov3.cfg --weights yolov3.weights --classes yolov3.txt i get this error

Traceback (most recent call last):
  File "yolo_opencv.py", line 8, in <module>
    import cv2
ImportError: /opt/ros/kinetic/lib/python2.7/dist-packages/cv2.so: undefined symbol: PyCObject_Type

how can i solve this error? (both would be nice, i would like to use python3 if it’s possible)

[trantuanvu1602]

modify cv2.dnn.readNet to cv2.dnn.readNetFromDarknet

[hunaidkhan2000]

Use pip install opencv-python==4.0.0.21 should resolve your issue