用到zxing，https://github.com/zxing/zxing
这本身是java实现的
（1）下载java
https://www.java.com/zh-CN/download/
或者https://www.oracle.com/java/technologies/javase-downloads.html
（2）安装pyzxing
https://github.com/ChenjieXu/pyzxing
pip install pyzxing
（3）测试
from pyzxing import BarCodeReader
reader = BarCodeReader()
results = reader.decode(\'/Users/xuehuiping/Desktop/WX20210301-142455@2x.png\')
print(results)