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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 determine_size(self, capture):
 """Determines the height and width of the image source. If no dimensions are available, this method defaults to a resolution of 640x480, thus returns (480, 640). If capture has a get method it is assumed to understand `cv2.CAP_PROP_FRAME_WIDTH` and `cv2.CAP_PROP_FRAME_HEIGHT` to get the information. Otherwise it reads one frame from the source to determine image dimensions. Args: capture: the source to read from. Returns: A tuple containing integers of height and width (simple casts). """

        width = 640
        height = 480
        if capture and hasattr(capture, 'get'):
            width = capture.get(cv2.CAP_PROP_FRAME_WIDTH)
            height = capture.get(cv2.CAP_PROP_FRAME_HEIGHT)
        else:
            self.frame_offset += 1
            ret, frame = capture.read()
            if ret:
                width = frame.shape[1]
                height = frame.shape[0]
        return (int(height), int(width))