首先需要安装pyzbar和opencv

pip install -i https://pypi.mirrors.ustc.edu.cn/simple/ opencv-python
pip install -i https://pypi.mirrors.ustc.edu.cn/simple/ pyzbar

这里要注意，pyzbar可能安装上依赖的dll不存在会报错，需要去下载安装c++相关dll

地址为：

https://www.microsoft.com/en-US/download/details.aspx?id=40784

上代码

from cv2 import cv2
from pyzbar import pyzbar
#wanmait.com

def codedemo():
    camera = cv2.VideoCapture(0)
    cv2.namedWindow('wanmait')
    cv2.namedWindow('small')
    while True:
        ret, frame = camera.read()
        if ret:
            #二维码解析的信息
            barcodes = pyzbar.decode(frame)
            for barcode in barcodes:
                print(f"万码学堂读取的二维码信息：{barcode.data.decode('utf-8')}")
                x,y,w,h =  barcode.rect
                cv2.rectangle(frame,(x,y),(x+w,y+h),(255,0,0),2)
                #截取图片中的二维码部分
                img = frame[y:y+h, x:x+w]
                #保存二维码
                cv2.imwrite('d:/photos/code.jpg',img)
                #把二维码单独显示出来
                cv2.imshow('small', img)

            cv2.imshow('wanmait', frame)

            #cv2.imwrite()
            if cv2.waitKey(100) == 27:
                break
    camera.release()
    cv2.destroyAllWindows()

if __name__=='__main__':
    codedemo()

运行如图：