No module named 'cv2'

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I have install opencv using pip install opencv-python ,it install but when i try to run code error pops up "no module named'cv2'" The code is

import cv2
from darkflow.net.build import TFNet
import numpy as np
import time

option= {
    'model':'cfg/yolo.cfg',
    'load':'bin/yolov2.weights',
    'threshold': 0.13,
    }

tfnet = TFNet(option)
colors = [tuple(255 * np.random.rand(3)) for _ in range(10)]

capture = cv2.VideoCapture('me.mp4')
capture.set(cv2.CAP_PROP_FRAME_WIDTH, 512)
capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 512)

while True:
    stime = time.time()
    ret, frame = capture.read()
    if ret:
        results = tfnet.return_predict(frame)
        for color, result in zip(colors, results):
            tl = (result['topleft']['x'], result['topleft']['y'])
            br = (result['bottomright']['x'], result['bottomright']['y'])
            label = result['label']
            confidence = result['confidence']
            text = '{}: {:.0f}%'.format(label, confidence * 100)
            frame = cv2.rectangle(frame, tl, br, color, 5)
            frame = cv2.putText(
                frame, text, tl, cv2.FONT_HERSHEY_COMPLEX, 1, (0, 0, 0), 2)
        cv2.imshow('frame', frame)
        print('FPS {:.1f}'.format(1 / (time.time() - stime)))
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

capture.release()
cv2.destroyAllWindows()

The error is

RESTART: C:\Users\Raja kashif\Desktop\project\darkflow-master\video test.py Traceback (most recent call last): File "C:\Users\Raja kashif\Desktop\project\darkflow-master\video test.py", line 1, in <module> import cv2 ModuleNotFoundError: No module named 'cv2'