Ошибка в opencv-python:AttributeError: partially initialized module 'cv2' has no attribute 'VideoCapture' (most likely due to a circular import)

у меня пишет ошибку:

AttributeError: partially initialized module 'cv2' has no attribute 'VideoCapture' (most likely due to a circular import)

Код:

import numpy as np
import cv2


cap = cv2.VideoCapture(0)

while(True): 
    ret, frame = cap.read()
    gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
    cv2.imshow('Video', frame)
    # cv2.imshow('frame',gray)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()