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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def url_to_image(url, flag=cv2.IMREAD_COLOR):
 """ download the image, convert it to a NumPy array, and then read it into OpenCV format """

    resp = urlopen(url)
    image = np.asarray(bytearray(resp.read()), dtype="uint8")
    image = cv2.imdecode(image, flag)
    return image