argparse库报argparse error: the following arguments are required

问题遇到的现象和发生背景

我想用argparse库实现在cmd中调用我写的py文件，在传参的时候总是报argparse error: the following arguments are required: -i/--image这个错误

用代码块功能插入代码，请勿粘贴截图

from pyzbar import pyzbar
import argparse
import cv2

# construct the argument parser and parse the arguments
ap = argparse.ArgumentParser()
ap.add_argument("-i", "--image", required=True, help="path to input image")
args = vars(ap.parse_args())

# load the input image
image = cv2.imread(args["image"])

# find the barcodes in the image and decode each of the barcodes
barcodes = pyzbar.decode(image)

# loop over the detected barcodes
for barcode in barcodes:
    # extract the bounding box location of the barcode and draw the
    # bounding box surrounding the barcode on the image
    (x, y, w, h) = barcode.rect
    cv2.rectangle(image, (x, y), (x + w, y + h), (0, 0, 255), 2)

    # the barcode data is a bytes object so if we want to draw it on
    # our output image we need to convert it to a string first
    barcodeData = barcode.data.decode("utf-8")
    barcodeType = barcode.type

    # draw the barcode data and barcode type on the image
    text = "{} ({})".format(barcodeData, barcodeType)
    cv2.putText(image, text, (x, y - 10), cv2.FONT_HERSHEY_SIMPLEX,
        0.5, (0, 0, 255), 2)

# show the output image
cv2.imshow("Image", image)
cv2.waitKey(0)

运行结果及报错内容

报这个错argparse error: the following arguments are required: -i/--image

我的解答思路和尝试过的方法

我尝试了绝对路径和相对路径都不行，我也试了设置默认值并把required改成False，也不行，在这上面查了只有在pycharm里运行成功的

运行脚本时候要加上-i 参数.
比如python test.Py -i 你的图片参数