https://docs.python.org/zh-cn/3/tutorial/index.html
2.菜鸟教程http://www.runoob.com/
3.W3schoolhttp://www.w3school.com.cn/
4.Python3简明教程https://www.jmjc.tech/tutorial/python/1
5.python Code Examplehttps://www.programcreek.com/python/
6.LearnPythonhttps://www.learnpython.org/