python multithreading Reference article

1. https://www.jianshu.com/p/c93e630d8089

2.https://www.runoob.com/python/python-multithreading.html

3.https://www.jianshu.com/p/b9763f6d021f

4. https://www.cnblogs.com/wangchunli-blogs/p/9949894.html

 5. https://www.cnblogs.com/wangchengpei/p/10958043.html