python
——http://www.runoob.com/python/python-tutorial.html
——https://www.liaoxuefeng.com/wiki/0014316089557264a6b348958f449949df42a6d3a2e542c000
numpy
——https://www.numpy.org.cn/article/basics/an_introduction_to_scientific_python_numpy.html
toanado
——https://docs.pythontab.com/tornado/introduction-to-tornado/ch1.html